findbugs: ignore: generate GWT class get findbugs Boolean constructor warning

findbugs complain of using Boolean constructor instead of Boolean.valueOf
This calss is GWT generated code

findbugs reason:
Dm: Method invokes inefficient Boolean constructor; use Boolean.valueOf(...) instead (DM_BOOLEAN_CTOR)

Change-Id: I006a4465cf236858c17f6be5cc27e9d811c084f9
Signed-off-by: Shahar Havivi <shavivi@redhat.com>