Bump oauthenticator's major version in a dedicated PR

Author: consideRatio

images/hub/requirements.txt

@@ -117,7 +117,7 @@ mwoauth==0.4.0
     # via -r requirements.in
 nullauthenticator==1.0.0
     # via -r requirements.in
-oauthenticator==17.0.0
+oauthenticator==16.3.0
     # via -r requirements.in
 oauthlib==3.2.2
     # via