Fixed FindBugs warnings in sal-akk-raft and enabled the maven plugin to
run and fail the build on violations. Some warnngs were suppressed with
justification provided.
Change-Id: I96b4bb58e6f5a6c3d3d14dadb9567df58ef5905f Signed-off-by: Tom Pantelis <tpanteli@brocade.com>