RHDM-886: set and override maven-compiler-plugin to version 3.8.1 (#1027)
RHDM-886: set and override maven-compiler-plugin to version 3.8.1 (#1027)


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