Remove duplicate word in sahara, glance, manila doc

Remove duplicate word 'the' and 'a'
Trivial fix

Change-Id: I670b5dd1102da1261463091e452b8632f1403846
Closes-Bug: #1564315

api-ref/src/docbkx/ch_share-v1.xml

@@ -16,7 +16,7 @@
     Provides coordinated access to shared or distributed file systems.
   </para>
   <para>
-    The Shared File Systems API v1 is functionally identical to the the <link
+    The Shared File Systems API v1 is functionally identical to the <link
     xlink:href="api-ref-share-v2.html#share-api-v2">Shared File Systems API
     v2</link>. Subsequent API v2 micro-versions, such as v2.1, differ from API
     v1.

api-ref/src/wadls/dataprocessing-api/src/v1.1/wadl/common.ent

@@ -1188,7 +1188,7 @@
     xmlns:wadl="http://wadl.dev.java.net/2009/02"
     xml:lang="EN">
     <para>
-      A set of key and value pairs that contain the the job object.
+      A set of key and value pairs that contain the job object.
     </para>
   </wadl:doc>
 </param>

api-ref/src/wadls/image-api/src/v2/common.ent

@@ -1167,7 +1167,7 @@
    <wadl:doc xmlns="http://docbook.org/ns/docbook"
       xmlns:wadl="http://wadl.dev.java.net/2009/02" xml:lang="EN">
       <para>
-         Hash that is used over the the image data. The Image service uses
+         Hash that is used over the image data. The Image service uses
          this value for verification.
       </para>
       <para>

firstapp/source/block_storage.rst

@@ -260,7 +260,7 @@ To detach and delete a volume:
 Work with the OpenStack Database service
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-Previously, you manually created the database, which is useful for a a single
+Previously, you manually created the database, which is useful for a single
 database that you rarely update. However, the OpenStack :code:`trove`
 component provides Database as a Service (DBaaS).