Update relaunch endpoints to use custom serializer, check passwords needed before creating/copying job or ad hoc command.

awx/main/access.py

@@ -92,14 +92,6 @@ def check_user_access(user, model_class, action, *args, **kwargs):
             return result
     return False
 
-def get_pk_from_dict(_dict, key):
-    '''
-    Helper for obtaining a pk from user data dict or None if not present.
-    '''
-    try:
-        return int(_dict[key])
-    except (TypeError, KeyError, ValueError):
-        return None
 
 class BaseAccess(object):
     '''