Issue #712. Set app.config.TESTING to true when we start the server i…

…n test mode.

run.py

@@ -90,6 +90,7 @@ def config_validator():
         # disable HttpOnly setting for session cookies so Selenium
         # can interact with them. *ONLY* do this for testing.
         app.config['SESSION_COOKIE_HTTPONLY'] = False
+        app.config['TESTING'] = True
         print("Starting server in ~*TEST MODE*~")
         app.run(host='localhost')
     else: