Bump hacking

hacking 3.0.x is too old. Bump it to the version currently used in
tempest repo.

Also remove the note about old pip's behavior because recent pip does
not require specific order.

Depends-on: https://review.opendev.org/c/openstack/tempest/+/906634
Change-Id: I9a7760dcbcba15213deaa03e3c2a5f42446905d1
diff --git a/keystone_tempest_plugin/tests/rbac/v3/test_policy_association.py b/keystone_tempest_plugin/tests/rbac/v3/test_policy_association.py
index a3cf76d..c1a1807 100644
--- a/keystone_tempest_plugin/tests/rbac/v3/test_policy_association.py
+++ b/keystone_tempest_plugin/tests/rbac/v3/test_policy_association.py
@@ -157,7 +157,7 @@
         This test must check
           * whether the persona can delete a policy association for a region
             and service
-        """
+        """  # noqa: E501
         pass
 
 
diff --git a/keystone_tempest_plugin/tests/scenario/keycloak.py b/keystone_tempest_plugin/tests/scenario/keycloak.py
index 50c3495..ef2b01d 100644
--- a/keystone_tempest_plugin/tests/scenario/keycloak.py
+++ b/keystone_tempest_plugin/tests/scenario/keycloak.py
@@ -26,7 +26,7 @@
 
     @property
     def url_base(self):
-        return self.keycloak_url + f'/admin/realms'
+        return self.keycloak_url + '/admin/realms'
 
     @property
     def token_endpoint(self):