Revise clustering service API

Senlin service has removed soft-delete support from the API and it has
renamed the 'created_time' and 'updated_time' fields to be 'created_at'
and 'updated_at' respectively to better align with other OpenStack
services. Another change is that sorting options for resource listing
have been changed to better align with cross-project guidelines.
Yet another change is that we removed support to node-join/leave
actions.

This patch updates the API specification to reflect these latest changes.

Change-Id: Id333003ca041842e5a264d6e5727bb4dd4dd9055

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

@@ -6,9 +6,9 @@
   xmlns:xref="http://www.w3.org/1999/xref"
   xmlns:wadl="http://wadl.dev.java.net/2009/02"
   version="5.0-extension RackBook-2.0"
-  xml:id="api.openstack.org-clustering" status="CURRENT">
-  <info xreflabel="api-ref-clustering.html">
-    <title>OpenStack Clustering API v1</title>
+  xml:id="api.openstack.org-clustering-v1" status="CURRENT">
+  <info xreflabel="api-ref-clustering-v1.html">
+    <title>OpenStack Clustering API v1 (CURRENT)</title>
     <copyright>
       <year>2015</year>
     </copyright>

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

@@ -103,7 +103,7 @@
         <title>Nodes</title>
         <para>
             Lists all nodes, and creates, shows information for, updates,
-            deletes, and triggers an action on a node.
+            deletes a node.
         </para>
         <wadl:resources xmlns:wadl="http://wadl.dev.java.net/2009/02">
             <wadl:resource href="../wadls/clustering-api/src/v1/wadl/clustering-api.wadl#nodes">
@@ -115,9 +115,6 @@
                 <wadl:method href="#updateNode"/>
                 <wadl:method href="#deleteNode"/>
             </wadl:resource>
-            <wadl:resource href="../wadls/clustering-api/src/v1/wadl/clustering-api.wadl#node_actions">
-                <wadl:method href="#node_action"/>
-            </wadl:resource>
         </wadl:resources>
     </section>
     <section xml:id="policies">