history: Removes ad_domain column from vm_configuration table

This patch removes ad_domain column from vm_configuration table.

Change-Id: I4047a8eedae7160fa634125f7c5864703c3cdaab
Related-To:  https://bugzilla.redhat.com/1051041
Signed-off-by: Shirly Radco <sradco@redhat.com>