Revert change in isApplicationEnabled if appName is null

appName is null by default in concurrent tasks because app context isn't propagated.
This needs to be fixed before appName can be considered not null.
Signed-off-by:Ondro Mihalyi <mihalyi@omnifish.ee>

appserver/concurrent/concurrent-impl/src/main/java/org/glassfish/concurrent/runtime/ContextSetupProviderImpl.java

@@ -250,7 +250,12 @@ private ComponentInvocation getSavedInvocation() {
      */
     private boolean isApplicationEnabled(String appId) {
         if (appId == null) {
-            return false;
+            /* FIXME: appId is null in concurrent tasks because app context isn't propagated 
+              and is empty by default. 
+            This should be fixed: either propagate an application context if there's no current context,
+            or set up a proper app context when the concurrent task is submitted.
+             */
+            return true;
         }
         Application app = applications.getApplication(appId);
         if (app != null) {