[DROOSS-729] upgrade robolectric from 2.4 to 3.1.2
[DROOSS-729] upgrade robolectric from 2.4 to 3.1.2

 *these deps should eventially by moved to ip-bom

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