JBPM-8029: Align javaassist for support GwtMockito in Java11 (#934)
JBPM-8029: Align javaassist for support GwtMockito in Java11 (#934)

* Alighn javaassist for support GwtMockito in Java11

* Add a reminder to remove temporary property.

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