IOError: [Errno 2] No such file or directory: 'README'

[YAMAMOTO Takashi]

v2, ml2, and rally jobs are failing with similar errors.

for example,
http://logs.openstack.org/87/199387/18/check/gate-tempest-dsvm-networking-midonet-ml2/66929a1/logs/devstacklog.txt.gz

2016-02-24 01:39:27.093 | ++ /opt/stack/new/networking-midonet/devstack/plugin.sh:source:L49: safe_chown -R stack /opt/stack/new/networking-midonet/devstack/../networking_midonet.egg-info
2016-02-24 01:39:27.093 | ++ /opt/stack/new/devstack/functions-common:safe_chown:L2231: _safe_permission_operation chown -R stack /opt/stack/new/networking-midonet/devstack/../networking_midonet.egg-info
2016-02-24 01:39:27.099 | ++ /opt/stack/new/devstack/functions-common:_safe_permission_operation:L2123: sudo chown -R stack /opt/stack/new/networking-midonet/devstack/../networking_midonet.egg-info
2016-02-24 01:39:27.105 | ++ /opt/stack/new/networking-midonet/devstack/plugin.sh:source:L52: pip_install --editable /opt/stack/new/midonet/python-midonetclient
2016-02-24 01:39:27.408 | ++ /opt/stack/new/devstack/inc/python:pip_install:L152: sudo -H http_proxy= https_proxy= no_proxy= PIP_FIND_LINKS= /usr/local/bin/pip2.7 install -c /opt/stack/new/requirements/upper-constraints.txt --editable /opt/stack/new/midonet/python-midonetclient
2016-02-24 01:39:27.903 | Ignoring PyMI: markers "sys_platform=='win32'" don't match your environment
2016-02-24 01:39:27.963 | Ignoring dnspython3: markers "python_version=='3.4'" don't match your environment
2016-02-24 01:39:28.072 | Ignoring python-ironic-inspector-client: markers "python_version=='3.4'" don't match your environment
2016-02-24 01:39:28.138 | Obtaining file:///opt/stack/new/midonet/python-midonetclient
2016-02-24 01:39:28.445 | Complete output from command python setup.py egg_info:
2016-02-24 01:39:28.445 | Traceback (most recent call last):
2016-02-24 01:39:28.445 | File "<string>", line 1, in <module>
2016-02-24 01:39:28.445 | File "/opt/stack/new/midonet/python-midonetclient/setup.py", line 92, in <module>
2016-02-24 01:39:28.445 | long_description=_readme(),
2016-02-24 01:39:28.445 | File "/opt/stack/new/midonet/python-midonetclient/setup.py", line 34, in _readme
2016-02-24 01:39:28.445 | with open("README") as f:
2016-02-24 01:39:28.445 | IOError: [Errno 2] No such file or directory: 'README'

[YAMAMOTO Takashi (yamamoto)]

https://review.gerrithub.io/#/c/264165/