[MNG-6176] Upgrade findbugs to 3.0.4 so that the site can be built with Java 7 and 8
[MNG-6176] Upgrade findbugs to 3.0.4 so that the site can be built with Java 7 and 8

vedmishr/demo1,josephw/maven,cstamas/maven,njuneau/maven,mizdebsk/maven,ChristianSchulte/maven,ChristianSchulte/maven,apache/maven,olamy/maven,ChristianSchulte/maven,lbndev/maven,xasx/maven,olamy/maven,njuneau/maven,lbndev/maven,cstamas/maven,mcculls/maven,apache/maven,vedmishr/demo1,josephw/maven,josephw/maven,lbndev/maven,njuneau/maven,xasx/maven,mizdebsk/maven,xasx/maven,cstamas/maven,mcculls/maven,apache/maven,mcculls/maven,vedmishr/demo1,mizdebsk/maven,olamy/maven