Fixed a bunch of typos throughout Neutron

Went through all of the docstrings in Neutron and did
some cleanup.  I'm sure there are bunch more that I have missed.

Change-Id: Ib29d2de1c580880c89ed4fd069e1515d0977a3e7
diff --git a/neutron/tests/tempest/common/isolated_creds.py b/neutron/tests/tempest/common/isolated_creds.py
index 5da24a9..163ce8a 100644
--- a/neutron/tests/tempest/common/isolated_creds.py
+++ b/neutron/tests/tempest/common/isolated_creds.py
@@ -297,7 +297,7 @@
             new_index = str(roles) + '-' + str(len(self.isolated_creds))
             self.isolated_creds[new_index] = exist_creds
             del self.isolated_creds[str(roles)]
-            # Handle isolated neutron resouces if they exist too
+            # Handle isolated neutron resources if they exist too
             if CONF.service_available.neutron:
                 exist_net = self.isolated_net_resources.get(str(roles))
                 if exist_net: