Changing vdsm-python-cpopen version Obsolete and Provides

This issue caused races between preferring python-cpopen on newer
versions of VDSM project.

Signed-off-by: Yaniv Bronhaim <ybronhei@redhat.com>
Merge pull request #17 from ficoos/vdsm-python-cpopen

Changing vdsm-python-cpopen version Obsolete and Provides