Update KV Release in 2019-12-java.md (#845)

update java KV release notes

releases/2019-12/2019-12-java.md

@@ -29,19 +29,19 @@ To use the GA and preview libraries, refer to the Maven dependency information b
 <dependency>
   <groupId>com.azure</groupId>
   <artifactId>azure-security-keyvault-certificates</artifactId>
-  <version>4.0.0-preview.5</version>
+  <version>4.0.0-beta.6</version>
 </dependency>
 
 <dependency>
   <groupId>com.azure</groupId>
-  <artifactId>azure-security-keyvault-keys</artifactId>
-  <version>4.0.0</version>
+  <artifactId>azure-security-keyvault-secrets</artifactId>
+  <version>4.0.1</version>
 </dependency>
 
 <dependency>
   <groupId>com.azure</groupId>
   <artifactId>azure-security-keyvault-keys</artifactId>
-  <version>4.0.0</version>
+  <version>4.0.1</version>
 </dependency>
 
 <dependency>
@@ -135,6 +135,12 @@ Detailed changelogs are linked from the [Quick Links](#quick-links) below. Here
   `EventHubProducerClient`.
 - Consumer and producer clients are no longer bound to a single partition.
 - `EventProcessorClient` is created and configured through `EventProcessorClientBuilder`.
+
+### Keyvault Certificates
+- The public API surface, including members and parameters, have had adjustments to their naming and organization to improve discoverability, provide better context to developers. For more details. please see the [KeyVault Certificates](https://github.com/Azure/azure-sdk-for-java/blob/master/sdk/keyvault/azure-security-keyvault-certificates/CHANGELOG.md#400-beta6-2019-12-04)
+
+### Keyvault Keys
+- Added the backend support in KeyEncryptionKeyClient to parse and use Symmetric Keys stored as a secret in the key vault for cryptography operations. For more details. please see the [KeyVault Keys](https://github.com/Azure/azure-sdk-for-java/blob/master/sdk/keyvault/azure-security-keyvault-keys/CHANGELOG.md#401-2019-12-06)
 
 ### Storage Blob
 - Optimized `downloadToFile` to avoid an unnecessary `getProperties` call and to lock on an ETag once the operation has