core: Change duplicate audit log values to unique ones

Since the audit log value is supposed to be unique, a test
will be added to enforce uniqueness of the audit log values
prior to that, since we have duplicate values in the AuditLogType
class we have to change first the duplicate values to different values
to ensure uniqueness

Change-Id: Ife969c6a094ba8acf4b7b1544be017d8a034485f
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1145977
Signed-off-by: Tal Nisan <tnisan@redhat.com>