Change spec_key from controller-test to testing-facade (#878)

Author: jonathan-r-thorpe

nmostesting/NMOSTesting.py

@@ -399,7 +399,7 @@
             "api_key": "controlframework",
             "disable_fields": ["host", "port", "selector"]
         }, {
-            "spec_key": "controller-tests",
+            "spec_key": "testing-facade",
             "api_key": "testquestion",
             "disable_fields": ["selector"] if CONFIG.MS05_INTERACTIVE_TESTING else ["host", "port", "selector"]
         }],