Revert "core: Host's Compatibility Version doesn't match the Cluster's Compatibility Version", as it was decided that this implementation is wrong

This reverts commit 9d99c9b4cfea147f4213d1aca67f4a2a90fe12cd.

Change-Id: Iea9113ac67590c8f7a39b8c458e2de60f623491f
Signed-off-by: lzelkha@redhat.com