[JSDoc] Add namespace docs

WTD-1482.

platform/persistence/cache/src/CachingPersistenceDecorator.js

@@ -21,6 +21,11 @@
  *****************************************************************************/
 /*global define*/
 
+/**
+ * This bundle decorates the persistence service to maintain a local cache
+ * of persisted documents.
+ * @namespace platform/persistence/cache
+ */
 define(
     [],
     function () {

platform/persistence/couch/src/CouchPersistenceProvider.js

@@ -21,6 +21,11 @@
  *****************************************************************************/
 /*global define*/
 
+/**
+ * This bundle implements a persistence service which uses CouchDB to
+ * store documents.
+ * @namespace platform/persistence/cache
+ */
 define(
     ["./CouchDocument"],
     function (CouchDocument) {

platform/persistence/elastic/src/ElasticPersistenceProvider.js

@@ -21,6 +21,11 @@
  *****************************************************************************/
 /*global define*/
 
+/**
+ * This bundle implements a persistence service which uses ElasticSearch to
+ * store documents.
+ * @namespace platform/persistence/elastic
+ */
 define(
     [],
     function () {

platform/persistence/queue/src/QueuingPersistenceCapabilityDecorator.js

@@ -22,7 +22,10 @@
 /*global define,Promise*/
 
 /**
- * Module defining CoreCapabilityProvider. Created by vwoeltje on 11/7/14.
+ * This bundle decorates the persistence service to handle persistence
+ * in batches, and to provide notification of persistence errors in batches
+ * as well.
+ * @namespace platform/persistence/queue
  */
 define(
     ['./QueuingPersistenceCapability'],