Add provisioning string for "Not available" and block device wiping

Added default value in provisioning status
Added listener to handle row click event, Which will enabled/disabled wipe button base on wipe(provisioning) status

js/data/ProvisioningStatus.js

@@ -60,8 +60,9 @@ Zarafa.plugins.mdm.data.ProvisioningStatus = Zarafa.core.Enum.create({
 				return _('Wipe Requested', 'plugin_mdm');
 			case Zarafa.plugins.mdm.data.ProvisioningStatus.WIPE_EXECUTED:
 				return _('Wipe Executed', 'plugin_mdm');
+			default:
+				return _('Not Available', 'plugin_mdm');
 		}
-        return '';
 	}
 });