Fix "it's" grammar errors.

Change-Id: I32a41a60bc36caaa6bbc71ac24b620a0bb66a6dc

AUTHORS

@@ -72,6 +72,7 @@ Michael Basnight <mbasnight@gmail.com>
 Michael Still <mikal@stillhq.com>
 Monty Taylor <mordred@inaugust.com>
 Pádraig Brady <P@draigBrady.com>
+Paul McMillan <paul.mcmillan@nebula.com>
 Paul Voccio <paul@substation9.com>
 Peng Yong <ppyy@pubyun.com>
 Pete Zaitcev <zaitcev@kotori.zaitcev.us>

doc/source/configuringservices.rst

@@ -175,7 +175,7 @@ Configuring Swift to use Keystone
 ---------------------------------
 
 Similar to Nova, swift can be configured to use Keystone for authentication
-rather than it's built in 'tempauth'.
+rather than its built in 'tempauth'.
 
 1. Add a service endpoint for Swift to Keystone
 

doc/source/developing.rst

@@ -60,9 +60,9 @@ You can interact with Keystone through the command line using
 :doc:`man/keystone-manage` which allows you to establish tenants, users, etc.
 
 
-You can also interact with Keystone through it's REST API. There is a python
+You can also interact with Keystone through its REST API. There is a python
 keystone client library `python-keystoneclient`_ which interacts exclusively
-through the REST API, and which keystone itself uses to provide it's
+through the REST API, and which keystone itself uses to provide its
 command-line interface.
 
 When initially getting set up, after you've configured which databases to use,

doc/source/old/endpoints.rst

@@ -285,7 +285,7 @@ them all whenever a service changed versions or I added a new service.
 
 To provide a simpler mechanism to manage endpoints on tenants, Keystone uses
 Endpoint Templates. I can, for example, define a template with parametrized URLs
-and set it's `global` to true and that will show up as an endpoint on all the tenants
+and set its `global` to true and that will show up as an endpoint on all the tenants
 I have. Here is an example:
 
 Define a global Endpoint Template::