tests: disable ecore system modules in elm_suite

Summary:
ref T6864

Depends on D5967

Reviewers: stefan_schmidt

Subscribers: cedric

Maniphest Tasks: T6864

Differential Revision: https://phab.enlightenment.org/D5968

src/tests/elementary/elm_suite.c

@@ -162,6 +162,7 @@ main(int argc, char **argv)
      }
 
    main_pid = getpid();
+   ecore_app_no_system_modules();
    efreet_cache_disable();
 
    failed_count = _efl_suite_build_and_run(argc - 1, (const char **)argv + 1,