wcs: update to use appropriate role class (#52513)

wcs/has_role.py

@@ -2,7 +2,6 @@ import os
 import sys
 
 from ..qommon.ctl import Command, make_option
-from wcs.roles import Role
 
 
 class Cmd(Command):
@@ -18,7 +17,7 @@ class Cmd(Command):
         publisher = publisher.WcsPublisher.create_publisher(register_tld_names=False)
         publisher.app_dir = os.path.join(publisher.app_dir, sub_options.domain)
         publisher.set_config()
-        for role in Role.select():
+        for role in publisher.role_class.select():
             if role.name == args[0]:
                 sys.exit(0)
         sys.exit(1)