Fix wrong oauth handlers being referenced

* previously, the invenio-oauthclient.contrib.keycloak handlers were
  still referenced, which may not be available

invenio_config_tuw/keycloak/settings.py

@@ -81,11 +81,11 @@ class KeycloakSettingsHelper:
             icon="",
             authorized_handler="invenio_oauthclient.handlers"
             ":authorized_signup_handler",
-            disconnect_handler="invenio_oauthclient.contrib.keycloak.handlers"
+            disconnect_handler="invenio_config_tuw.keycloak.handlers"
             ":disconnect_handler",
             signup_handler=dict(
-                info="invenio_oauthclient.contrib.keycloak.handlers" ":info_handler",
-                setup="invenio_oauthclient.contrib.keycloak.handlers" ":setup_handler",
+                info="invenio_config_tuw.keycloak.handlers" ":info_handler",
+                setup="invenio_config_tuw.keycloak.handlers" ":setup_handler",
                 view="invenio_oauthclient.handlers:signup_handler",
             ),
             params=dict(
@@ -106,12 +106,12 @@ class KeycloakSettingsHelper:
             dict(
                 authorized_handler="invenio_oauthclient.handlers.rest"
                 ":authorized_signup_handler",
-                disconnect_handler="invenio_oauthclient.contrib.keycloak.handlers"
+                disconnect_handler="invenio_config_tuw.keycloak.handlers"
                 ":disconnect_rest_handler",
                 signup_handler=dict(
-                    info="invenio_oauthclient.contrib.keycloak.handlers"
+                    info="invenio_config_tuw.keycloak.handlers"
                     ":info_handler",
-                    setup="invenio_oauthclient.contrib.keycloak.handlers"
+                    setup="invenio_config_tuw.keycloak.handlers"
                     ":setup_handler",
                     view="invenio_oauthclient.handlers.rest:signup_handler",
                 ),