redirect to application context root after logout instead of gwt html page

(cherry picked from commit bb968a7be3c03033a805ac3115114af67b08e655)
adjusted kie-drools-wb EAP module to include jbpm module as dependency as it's required after introduction of asset-mgmt

(cherry picked from commit d8e4ba56b4bedbb95e07315eb100084fa5bc47de)