Fix typos

There are some wrong words, it should be updated.

Change-Id: I2d9ff4766d7c2dc508e3cb179446b44ccb042fcc

cinder/api/openstack/rest_api_version_history.rst

@@ -77,7 +77,7 @@ user documentation.
   Added /clusters endpoint to list/show/update clusters.
 
   Show endpoint requires the cluster name and optionally the binary as a URL
-  paramter (default is "cinder-volume").  Returns:
+  parameter (default is "cinder-volume").  Returns:
 
   .. code-block:: json
 
@@ -204,7 +204,7 @@ user documentation.
 3.17
 ----
   os-snapshot-manage and os-volume-manage now support ``cluster`` parameter on
-  listings (summay and detailed).  Both location parameters, ``cluster`` and
+  listings (summary and detailed).  Both location parameters, ``cluster`` and
   ``host`` are exclusive and only one should be provided.
 
 3.18

doc/source/devref/groups.rst

@@ -125,7 +125,7 @@ support consistent group snapshot:
 
 - delete_group_snapshot(context, group_snapshot, snapshots)
 
-Here is an example that add CG capabitilty to generic volume groups [3].
+Here is an example that add CG capability to generic volume groups [3].
 Details of driver interfaces are as follows.
 
 **create_group**

doc/source/devref/i18n.rst

@@ -2,7 +2,7 @@ Internationalization
 ====================
 
 For internationalization guidelines, see the
-`oslo.i18n documention <http://docs.openstack.org/developer/oslo.i18n/guidelines.html>`_.
+`oslo.i18n documentation <http://docs.openstack.org/developer/oslo.i18n/guidelines.html>`_.
 The information below can be used to get started.
 
 Cinder uses `gettext <http://docs.python.org/library/gettext.html>`_ so that

doc/source/upgrade.rst

@@ -49,7 +49,7 @@ Online Data Migrations
 
 To make DB schema migrations less painful to execute, since Liberty, all data
 migrations are banned from schema migration scripts. Instead, the migrations
-should be done by backgroud process in a manner that doesn't interrupt running
+should be done by background process in a manner that doesn't interrupt running
 services (you can also execute online data migrations with services turned off
 if you're doing a cold upgrade). In Ocata a new ``cinder-manage db
 online-data-migrations`` utility was added for that purpose.  Before upgrading