public_port and admin_port are strings

[Dolph Mathews]

Noticed on the mailing list: https://lists.launchpad.net/openstack/msg21580.html

public_port and admin_port are defined as strings in keystone.config, resulting in non-default settings failing when parsed for default public_endpoint and admin_endpoint values.

 TypeError: Error in file /etc/keystone/keystone.conf: %d format: a number is required, not str
 Traceback (most recent call last):
   File "/usr/bin/keystone-all", line 109, in <module>
     options = deploy.appconfig('config:%s' % paste_config)
   File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 261, in appconfig
     global_conf=global_conf)
   File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 296, in loadcontext
     global_conf=global_conf)
   File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 320, in _loadconfig
     return loader.get_context(object_type, name, global_conf)
   File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 413, in get_context
     defaults = self.parser.defaults()
   File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 68, in defaults
     defaults[key] = self.get('DEFAULT', key) or val
   File "/usr/lib/python2.7/ConfigParser.py", line 623, in get
     return self._interpolate(section, option, value, d)
   File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 75, in _interpolate
     self, section, option, rawval, vars)
   File "/usr/lib/python2.7/ConfigParser.py", line 666, in _interpolate
     value = value % vars
 TypeError: Error in file /etc/keystone/keystone.conf: %d format: a number is required, not str

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/23623

[Christopher Armstrong (radix)]

There's already a bug and patch for this https://bugs.launchpad.net/keystone/+bug/1137696

But I think your patch is better.