core: findbugs - redundant if condition

Removing the redundant if condition since this is catched in the first
if in the chain.

http://jenkins.ovirt.org/job/ovirt_engine_master_find_bugs/5651/findbugsResult/LOW/type.-1629582128/source.17153/#34

Change-Id: I456b2713663b2b911c7b1e32be2e6c222d68be6c
Signed-off-by: Eli Mesika <emesika@redhat.com>