Fix typos in documents and comments

Fix typos detected by toolkit misspellings.

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

Change-Id: Ifbbc29537d9d129aad238de6c37718c4fbb8349b

doc/source/using-api-v2.rst

@@ -29,7 +29,7 @@ You create a valid ``keystoneclient.v2_0.client.Client`` object by passing
 authentication data to the constructor. Authentication and examples of common
 tasks are provided below.
 
-You can generally expect that when the client needs to propogate an exception
+You can generally expect that when the client needs to propagate an exception
 it will raise an instance of subclass of
 ``keystoneclient.exceptions.ClientException``
 

keystoneclient/middleware/auth_token.py

@@ -1063,7 +1063,7 @@ class AuthProtocol(object):
             cache_key = CACHE_KEY_TEMPLATE % memcache_crypt.get_cache_key(keys)
             data_to_store = memcache_crypt.protect_data(keys, serialized_data)
 
-        # Historically the swift cache conection used the argument
+        # Historically the swift cache connection used the argument
         # timeout= for the cache timeout, but this has been unified
         # with the official python memcache client with time= since
         # grizzly, we still need to handle folsom for a while until

keystoneclient/service_catalog.py

@@ -201,7 +201,7 @@ class ServiceCatalog(object):
     def get_data(self):
         """Get the raw catalog structure.
 
-        Get the version dependant catalog structure as it is presented within
+        Get the version dependent catalog structure as it is presented within
         the resource.
 
         :returns: list containing raw catalog data entries or None