Fix typos picked up by misspellings

Joe Gordon has introduced a module named misspellings which can check
typo automatically.

$ pip install misspellings
$ git ls-files | grep -v locale | misspellings -f -

Change-Id: I9eca2e097b03468651814fa563e4380fd573205e
ref: http://lists.openstack.org/pipermail/openstack-dev/2013-December/020975.html

ceilometerclient/v2/options.py

@@ -93,7 +93,7 @@ def cli_to_array(cli_query):
     for q in queries:
         frag = split_by_op(q)
         if len(frag) > 1:
-            raise ValueError('incorrect seperator %s in query "%s"' %
+            raise ValueError('incorrect separator %s in query "%s"' %
                              ('(should be ";")', q))
         if len(frag) == 0:
             raise ValueError('invalid query %s' % q)

ceilometerclient/v2/shell.py

@@ -271,7 +271,7 @@ def common_alarm_arguments(create=False):
         @utils.arg('--insufficient-data-action',
                    dest='insufficient_data_actions',
                    metavar='<Webhook URL>', action='append', default=None,
-                   help=('URL to invoke when state transitions to unkown. '
+                   help=('URL to invoke when state transitions to unknown. '
                          'May be used multiple times.'))
         @functools.wraps(func)
         def _wrapped(*args, **kwargs):