Upgrade findbugs-plugin from 3.0.3 to 3.0.4
Upgrade findbugs-plugin from 3.0.3 to 3.0.4

ryanzhang/droolsjbpm-build-bootstrap,droolsjbpm/droolsjbpm-build-bootstrap,porcelli-forks/droolsjbpm-build-bootstrap,ryanzhang/droolsjbpm-build-bootstrap,kiereleaseuser/droolsjbpm-build-bootstrap,drdaveg/droolsjbpm-build-bootstrap,droolsjbpm/droolsjbpm-build-bootstrap,drdaveg/droolsjbpm-build-bootstrap,kiereleaseuser/droolsjbpm-build-bootstrap,porcelli-forks/droolsjbpm-build-bootstrap