webadmin: Change enums to fit common enum names

The patch completes changes introduced by patch
http://gerrit.ovirt.org/#/c/10588 which modifies
the enums to comply with java naming conventions.

Change-Id: If1fae65da08103c83b2add9e5db8510bc68955ee
Signed-off-by: Moti Asayag <masayag@redhat.com>