Unify value of "xsd:boolean" in Clustering API

This patch makes values of "xsd:boolean" in Clustering API to be uniform.
Currently, the values of "xsd:boolean" is some times presented by
<code>True</code> or <code>true</true>. As my knowledge, the value should
be <code>true</code>.
Reference link:
http://stackoverflow.com/questions/1308491/xsdboolean-element-typed
-accept-true-but-not-true-how-can-i-make-it-accept

Partial-Bug: #1562766

Change-Id: I24edf1e4087852d80d115c66c0908d499de56ad3

api-ref/src/wadls/clustering-api/src/v1/common.ent

@@ -9,8 +9,8 @@
         </para>
         <para>
             If you are an administrative user and you set this value to
-            <code>True</code>, the call returns all objects from all projects.
-            Default is <code>False</code>, which returns only objects in the
+            <code>true</code>, the call returns all objects from all projects.
+            Default is <code>false</code>, which returns only objects in the
             current project.
         </para>
     </wadl:doc>

api-ref/src/wadls/clustering-api/src/v1/samples/policy-type-show-response.json

@@ -21,7 +21,7 @@
             },
             "destroy_after_deletion": {
                 "default": true,
-                "description": "Whether a node should be completely destroyed after deletion. Default to True",
+                "description": "Whether a node should be completely destroyed after deletion. Default to true",
                 "required": false,
                 "type": "Boolean"
             },
@@ -33,7 +33,7 @@
             },
             "reduce_desired_capacity": {
                 "default": false,
-                "description": "Whether the desired capacity of the cluster should be reduced along the deletion. Default to False.",
+                "description": "Whether the desired capacity of the cluster should be reduced along the deletion. Default to false.",
                 "required": false,
                 "type": "Boolean"
             }

api-ref/src/wadls/clustering-api/src/v1/wadl/clustering-api.wadl

@@ -1145,7 +1145,7 @@
                     <wadl:doc xmlns="http://docbook.org/ns/docbook" xml:lang="EN">
                         <para>
                             Indicates whether the node details are returned.
-                            Default is <code>False</code>.
+                            Default is <code>false</code>.
                         </para>
                     </wadl:doc>
                 </param>