utils: ovf: move compat xml to ovf as it is the only consumer

Related-To: https://bugzilla.redhat.com/show_bug.cgi?id=1139000
Change-Id: Iae2b6e697f82702cfb211c670a079f2da14994de
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>