Enable flake8 checking of ironic/nova/*

The directory ironic/nova/* was being excluded from the flake8 check.

Make some minor whitespace and comment changes to
ironic/nova/compute/manager.py to make it pass the flake8 checks.

Change-Id: I5a76550db3b28a87964d1505441246cdb0354ee7

ironic/nova/compute/manager.py

@@ -23,9 +23,9 @@ work. The goal here is to generalise the areas where n-c talking to a clustered
 hypervisor has issues, and long term fold them into the main ComputeManager.
 """
 
-from oslo_concurrency import lockutils
 from nova.compute import manager
 import nova.context
+from oslo_concurrency import lockutils
 
 
 CCM_SEMAPHORE = 'clustered_compute_manager'
@@ -63,7 +63,9 @@ class ClusteredComputeManager(manager.ComputeManager):
         #         self.driver.filter_defer_apply_off()
 
     def pre_start_hook(self):
-        """After the service is initialized, but before we fully bring
+        """Update our available resources
+
+        After the service is initialized, but before we fully bring
         the service up by listening on RPC queues, make sure to update
         our available resources (and indirectly our available nodes).
         """
@@ -80,7 +82,9 @@ class ClusteredComputeManager(manager.ComputeManager):
 
     @lockutils.synchronized(CCM_SEMAPHORE, 'ironic-')
     def _update_resources(self):
-        """Updates resources while protecting against a race on
+        """Update our resources
+
+        Updates the resources while protecting against a race on
         self._resource_tracker_dict.
         """
         self.update_available_resource(nova.context.get_admin_context())

tox.ini

@@ -73,7 +73,7 @@ commands = {posargs}
 [flake8]
 # E711: ignored because it is normal to use "column == None" in sqlalchemy
 ignore = E129,E711
-exclude =  .venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build,tools,*ironic/nova*
+exclude =  .venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build,tools
 max-complexity=17
 
 [hacking]