[2883] change module_description of a spec file for testing

src/lib/python/isc/notify/tests/testdata/test_spec1.spec

 {
   "module_spec": {
     "module_name": "NotifyOutLike",
-    "module_description": "XFR in daemon",
+    "module_description": "Test notifier",
     "config_data": [],
     "commands": [],
     "statistics": [