IDEA-104500 Gradle: Allow to reuse common logic for other external systems

Don't process orphan external modules when the project is already closed

platform/external-system-impl/src/com/intellij/openapi/externalSystem/util/ExternalSystemUtil.java

@@ -199,7 +199,7 @@ public class ExternalSystemUtil {
 
       @Override
       public void onFailure(@NotNull String errorMessage, @Nullable String errorDetails) {
-        if (--myCounter <= 0) {
+        if (--myCounter <= 0 && !project.isDisposed()) {
           processOrphanModules();
         }
       }