Update hacking and fix warning

Change-Id: I2e0d84e37bf6522e9b29bd01b6dbd3a8663283ba

mistralclient/auth/keycloak.py

@@ -173,6 +173,7 @@ def get_system_ca_file():
             return ca
     LOG.warning("System ca file could not be found.")
 
+
 # An example of working curl request to keycloak
 # curl -d "client_id=admin-cli" -d "client_secret=secret"
 # -d "username=admin" -d "password=qwerty" -d "grant_type=password"

test-requirements.txt

@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 coverage>=4.0 # Apache-2.0
-hacking>=1.1.0,<1.2.0 # Apache-2.0
+hacking>=1.1.0 # Apache-2.0
 python-openstackclient>=3.12.0 # Apache-2.0
 mock>=2.0.0 # BSD
 oslotest>=3.2.0 # Apache-2.0