<oo_admin_yum_validator.py> Bug 1028941, disable repos with conflicting subscriptions
https://bugzilla.redhat.com/show_bug.cgi?id=1028941

modified `check_version_conflict` to use a list comprehension instead
of `filter` to find conflicts, added logic to include repos with
conflicting subscription types in conflict calculation.
Merge pull request #176 from dobbymoodge/BZ1028941

<oo_admin_yum_validator.py> Bug 1028941, disable repos with conflicting subscriptions