Edits for nova.conf.sample

- replace "quotaing" with "quota checking"
- add space so shouldalways becomes "should always"

Modifies docstrings that we use to generate docs for config option
descriptions.

Change-Id: Ieca85ee997b9f85e9748387ee031714ad1b73f6b

etc/nova/nova.conf.sample

@@ -458,8 +458,8 @@
 # Options defined in nova.api.openstack.compute.contrib.os_tenant_networks
 #
 
-# Enables or disables quotaing of tenant networks (boolean
-# value)
+# Enables or disables quota checking for tenant networks
+# (boolean value)
 #enable_network_quota=false
 
 # Control for checking for default networks (string value)

nova/api/openstack/compute/contrib/os_tenant_networks.py

@@ -36,7 +36,8 @@ try:
     os_network_opts = [
         cfg.BoolOpt("enable_network_quota",
                     default=False,
-                    help="Enables or disables quotaing of tenant networks"),
+                    help=('Enables or disables quota checking for tenant '
+                          'networks')),
         cfg.StrOpt('use_neutron_default_nets',
                          default="False",
                          deprecated_name='use_quantum_default_nets',