Don't translate debug level logs in cloudpipe, hacking, ipv6, keymgr

Our translation policy
(https://wiki.openstack.org/wiki/LoggingStandards#Log_Translation) calls
for not translating debug level logs. This is to help prioritize log
translation. Furthermore translation has a performance overhead, even if
the log isn't used (since nova doesn't support lazy translation yet).

Change-Id: Icdae100d5a506fdaa56fd124dc9860cdfddbe288

nova/cloudpipe/pipelib.py

@@ -122,7 +122,7 @@ class CloudPipe(object):
         return encoded
 
     def launch_vpn_instance(self, context):
-        LOG.debug(_("Launching VPN for %s") % (context.project_id))
+        LOG.debug("Launching VPN for %s", context.project_id)
         key_name = self.setup_key_pair(context)
         group_name = self.setup_security_group(context)
         flavor = flavors.get_flavor_by_name(CONF.vpn_flavor)

nova/hacking/checks.py

@@ -219,6 +219,11 @@ def no_translate_debug_logs(logical_line, filename):
             "nova/cert",
             "nova/console",
             "nova/consoleauth",
+            "nova/cloudpipe",
+            "nova/image",
+            "nova/hacking",
+            "nova/ipv6",
+            "nova/keymgr",
            ]
     if max([name in filename for name in dirs]):
         if logical_line.startswith("LOG.debug(_("):