Description of problem:
The OSP8 version of python-urllib3 has a missing dependency in its RPM definition.  The OSP7 version includes python-backports-ssl_match_hostname as a dependancy, but the OSP8 version does not.  The results is a traceback when I try to import docker.client.

Version-Release number of selected component (if applicable):
python-urllib3-1.10.4-7.el7ost.noarch.rpm

How reproducible:
Start with a fresh install (no previous OSP7 packages installed).  Install python-urllib3.  Then in a python script, try to import docker.client.

Steps to Reproduce:
1. yum install -y python-urllib3
2. python -c 'docker.client'

Actual results:
# python -c 'import docker.client'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python2.7/site-packages/docker/__init__.py", line 20, in <module>
    from .client import Client, AutoVersionClient # flake8: noqa
  File "/usr/lib/python2.7/site-packages/docker/client.py", line 23, in <module>
    from . import clientbase
  File "/usr/lib/python2.7/site-packages/docker/clientbase.py", line 4, in <module>
    import requests
  File "/usr/lib/python2.7/site-packages/requests/__init__.py", line 58, in <module>
    from . import utils
  File "/usr/lib/python2.7/site-packages/requests/utils.py", line 26, in <module>
    from .compat import parse_http_list as _parse_list_header
  File "/usr/lib/python2.7/site-packages/requests/compat.py", line 7, in <module>
    from .packages import chardet
  File "/usr/lib/python2.7/site-packages/requests/packages/__init__.py", line 3, in <module>
    from . import urllib3
  File "/usr/lib/python2.7/site-packages/requests/packages/urllib3/__init__.py", line 10, in <module>
    from .connectionpool import (
  File "/usr/lib/python2.7/site-packages/requests/packages/urllib3/connectionpool.py", line 29, in <module>
    from .packages.ssl_match_hostname import CertificateError
  File "/usr/lib/python2.7/site-packages/requests/packages/urllib3/packages/__init__.py", line 3, in <module>
    from . import ssl_match_hostname
ImportError: cannot import name ssl_match_hostname

Expected results:
# python -c 'import docker.client'
#

Additional info:
Dependency list from OSP7 and OSP8 versions:
# rpm -qRp python-urllib3-1.10.4-1.20150503gita91975b.el7ost.noarch.rpm
ca-certificates
python(abi) = 2.7
python-backports-ssl_match_hostname
python-six
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PartialHardlinkSets) <= 4.0.4-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsXz) <= 5.2-1
# rpm -qRp python-urllib3-1.10.4-7.el7ost.noarch.rpm
ca-certificates
python(abi) = 2.7
python-six
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PartialHardlinkSets) <= 4.0.4-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsXz) <= 5.2-1