oauthclient: authorize url fix

* Changes authorize url to redirect to login form instead of register.
  (closes #2487)

* Moves imports inside functions.

Reviewed-by: Jiri Kuncar <jiri.kuncar@cern.ch>
Signed-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>
workflows: template naming fix

* Removes the hp prefix from holdingpen templates.

Reviewed-by: Jiri Kuncar <jiri.kuncar@cern.ch>
Sign-off-by: Georgios Papoutsakis <georgios.papoutsakis@cern.ch>