BZ-1129694: validations and refactoring in forms

Conflicts:
	jbpm-console-ng-executor-service/jbpm-console-ng-executor-service-client/src/main/java/org/jbpm/console/ng/es/client/editors/quicknewjob/QuickNewJobViewImpl.ui.xml
	jbpm-console-ng-executor-service/jbpm-console-ng-executor-service-client/src/main/java/org/jbpm/console/ng/es/client/editors/requestlist/RequestListViewImpl.java