Packstack allinone install fails on gnocchi if timezone is UTC

[Nick G]

the installation failed when running 127.0.0.1_gnocchi.pp with the error "error: unpack requires a string argument of length 44"

on further inspection this appears to be a bug in babel or pytz (pytz appears to be only catering for a local time zones...but that's what babel asked for so i'm not sure who's at fault)

System:
Centos 7.2 x64 (all updates and kernel upgrade applied 24th-July-2016
packstack centos-release-openstack-mitaka
pytz 2016.6.1
babel 2.3.4

2016-07-24 14:06:23.544 31784 CRITICAL gnocchi [-] error: unpack requires a string argument of length 44
2016-07-24 14:06:23.544 31784 ERROR gnocchi Traceback (most recent call last):
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/bin/gnocchi-upgrade", line 10, in <module>
2016-07-24 14:06:23.544 31784 ERROR gnocchi sys.exit(upgrade())
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/lib/python2.7/site-packages/gnocchi/cli.py", line 46, in upgrade
2016-07-24 14:06:23.544 31784 ERROR gnocchi index = indexer.get_driver(conf)
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/lib/python2.7/site-packages/gnocchi/indexer/__init__.py", line 78, in get_driver
2016-07-24 14:06:23.544 31784 ERROR gnocchi split.scheme).driver
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/lib/python2.7/site-packages/stevedore/driver.py", line 46, in __init__
2016-07-24 14:06:23.544 31784 ERROR gnocchi verify_requirements=verify_requirements,
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/lib/python2.7/site-packages/stevedore/named.py", line 55, in __init__
2016-07-24 14:06:23.544 31784 ERROR gnocchi verify_requirements)
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/lib/python2.7/site-packages/stevedore/extension.py", line 171, in _load_plugins
2016-07-24 14:06:23.544 31784 ERROR gnocchi self._on_load_failure_callback(self, ep, err)
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/lib/python2.7/site-packages/stevedore/extension.py", line 163, in _load_plugins
2016-07-24 14:06:23.544 31784 ERROR gnocchi verify_requirements,
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/lib/python2.7/site-packages/stevedore/named.py", line 123, in _load_one_plugin
2016-07-24 14:06:23.544 31784 ERROR gnocchi verify_requirements,
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/lib/python2.7/site-packages/stevedore/extension.py", line 184, in _load_one_plugin
2016-07-24 14:06:23.544 31784 ERROR gnocchi plugin = ep.resolve()
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2235, in resolve
2016-07-24 14:06:23.544 31784 ERROR gnocchi module = __import__(self.module_name, fromlist=['__name__'], level=0)
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/lib/python2.7/site-packages/gnocchi/indexer/sqlalchemy.py", line 30, in <module>
2016-07-24 14:06:23.544 31784 ERROR gnocchi import sqlalchemy_utils
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/lib/python2.7/site-packages/sqlalchemy_utils/__init__.py", line 47, in <module>
2016-07-24 14:06:23.544 31784 ERROR gnocchi from .i18n import TranslationHybrid # noqa
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/lib/python2.7/site-packages/sqlalchemy_utils/i18n.py", line 6, in <module>
2016-07-24 14:06:23.544 31784 ERROR gnocchi from babel.dates import get_day_names
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/lib/python2.7/site-packages/babel/dates.py", line 29, in <module>
2016-07-24 14:06:23.544 31784 ERROR gnocchi from babel.util import UTC, LOCALTZ
2016-07-24 14:06:23.544 31784 ERROR gnocchi File "/usr/lib/python2.7/site-packages/babel/util.py", line 19, in <module>
2016-07-24 14:06:23.544 31784 ERROR gnocchi from babel import localtime
2016-07-24 15:19:31.563 27509 ERROR gnocchi self._on_load_failure_callback(self, ep, err)
2016-07-24 15:19:31.563 27509 ERROR gnocchi File "/usr/lib/python2.7/site-packages/stevedore/extension.py", line 163, in _load_plugins
2016-07-24 15:19:31.563 27509 ERROR gnocchi verify_requirements,
2016-07-24 15:19:31.563 27509 ERROR gnocchi File "/usr/lib/python2.7/site-packages/stevedore/named.py", line 141, in _load_one_plugin
2016-07-24 15:19:31.563 27509 ERROR gnocchi verify_requirements,
2016-07-24 15:19:31.563 27509 ERROR gnocchi File "/usr/lib/python2.7/site-packages/stevedore/extension.py", line 184, in _load_one_plugin
2016-07-24 15:19:31.563 27509 ERROR gnocchi plugin = ep.resolve()
2016-07-24 15:19:31.563 27509 ERROR gnocchi File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2235, in resolve
2016-07-24 15:19:31.563 27509 ERROR gnocchi module = __import__(self.module_name, fromlist=['__name__'], level=0)
2016-07-24 15:19:31.563 27509 ERROR gnocchi File "/usr/lib/python2.7/site-packages/gnocchi/indexer/sqlalchemy.py", line 41, in <module>
2016-07-24 15:19:31.563 27509 ERROR gnocchi import sqlalchemy_utils
2016-07-24 15:19:31.563 27509 ERROR gnocchi File "/usr/lib/python2.7/site-packages/sqlalchemy_utils/__init__.py", line 49, in <module>
2016-07-24 15:19:31.563 27509 ERROR gnocchi from .i18n import TranslationHybrid # noqa
2016-07-24 15:19:31.563 27509 ERROR gnocchi File "/usr/lib/python2.7/site-packages/sqlalchemy_utils/i18n.py", line 11, in <module>
2016-07-24 15:19:31.563 27509 ERROR gnocchi import babel.dates
2016-07-24 15:19:31.563 27509 ERROR gnocchi File "/usr/lib64/python2.7/site-packages/babel/dates.py", line 29, in <module>
2016-07-24 15:19:31.563 27509 ERROR gnocchi from babel.util import UTC, LOCALTZ
2016-07-24 15:19:31.563 27509 ERROR gnocchi File "/usr/lib64/python2.7/site-packages/babel/util.py", line 261, in <module>
2016-07-24 15:19:31.563 27509 ERROR gnocchi from babel import localtime
2016-07-24 15:19:31.563 27509 ERROR gnocchi File "/usr/lib64/python2.7/site-packages/babel/localtime/__init__.py", line 74, in <module>
2016-07-24 15:19:31.563 27509 ERROR gnocchi LOCALTZ = get_localzone()
2016-07-24 15:19:31.563 27509 ERROR gnocchi File "/usr/lib64/python2.7/site-packages/babel/localtime/__init__.py", line 70, in get_localzone
2016-07-24 15:19:31.563 27509 ERROR gnocchi return _get_localzone()
2016-07-24 15:19:31.563 27509 ERROR gnocchi File "/usr/lib64/python2.7/site-packages/babel/localtime/_unix.py", line 135, in _get_localzone
2016-07-24 15:19:31.563 27509 ERROR gnocchi return pytz.tzfile.build_tzinfo('local', tzfile)
2016-07-24 15:19:31.563 27509 ERROR gnocchi File "/usr/lib/python2.7/site-packages/pytz/tzfile.py", line 30, in build_tzinfo
2016-07-24 15:19:31.563 27509 ERROR gnocchi typecnt, charcnt) = unpack(head_fmt, fp.read(head_size))
2016-07-24 15:19:31.563 27509 ERROR gnocchi error: unpack requires a string argument of length 44
2016-07-24 15:19:31.563 27509 ERROR gnocchi