Readme update for sasToken API in builder

sdk/storage/azure-storage-blob/CHANGELOG.md

@@ -25,6 +25,8 @@ and
 - Renamed `setTier` to `setAccessTier` from `BlobAsyncClientBase` and `BlobClientBase` classes.
 - Added `ParallelTransferOptions` to buffered upload, upload from file and download to file methods.
 - Removed `Metadata` class and uses Map<String, String> for `matadata` field of `BlobProperties` and `ContainerProperties`.
+- Removed SAS token generation APIs from clients, use BlobServiceSasSignatureValues to generate SAS tokens. 
+- Removed `SASTokenCredential`, `SASTokenCredentialPolicy` and the corresponding `credential(SASTokenCredential)` method in client builder, and added sasToken(String) instead.
 
 ## Version 12.0.0-preview.3 (2019-09-10)
 For details on the Azure SDK for Java (September 2019 Preview) release, you can refer to the [release announcement](https://aka.ms/azure-sdk-preview3-java).

sdk/storage/azure-storage-file/CHANGELOG.md

@@ -15,6 +15,8 @@ and
 - Fixed metadata does not allow capital letter issue. [`Bug 5295`](https://github.com/Azure/azure-sdk-for-java/issues/5295)
 - Updated the return type of `downloadToFile` API to `FileProperties` on sync API and `Mono<FileProperties>` on async API.
 - `getFileServiceUrl`, `getShareUrl`, `getDirectoryUrl`, `getFileUrl` API now returns URL with scheme, host, resource name and snapshot if any.
+- Removed SAS token generation APIs from clients, use FileServiceSasSignatureValues to generate SAS tokens. 
+- Removed `SASTokenCredential`, `SASTokenCredentialPolicy` and the corresponding `credential(SASTokenCredential)` method in client builder, and added sasToken(String) instead.
 
 ## Version 12.0.0-preview.3 (2019-09-10):
 For details on the Azure SDK for Java (September 2019 Preview) release, you can refer to the [release announcement](https://aka.ms/azure-sdk-preview3-java).

sdk/storage/azure-storage-queue/CHANGELOG.md

@@ -13,6 +13,9 @@ and
 - Changed `VoidResponse` to `Response<Void>` on sync API, and `Mono<VoidResponse>` to `Mono<Response<Void>>` on async API.
 - Fixed metadata does not allow capital letter issue. [`Bug 5295`](https://github.com/Azure/azure-sdk-for-java/issues/5295)
 - `getQueueServiceUrl`, `getQueueUrl` API now returns URL with scheme, host, resource name and snapshot if any.
+- Removed SAS token generation APIs from clients, use QueueServiceSasSignatureValues to generate SAS tokens. 
+- Removed `SASTokenCredential`, `SASTokenCredentialPolicy` and the corresponding `credential(SASTokenCredential)` method in client builder, and added sasToken(String) instead.
+
 
 
 ## Version 12.0.0-preview.3 (2019-09-10)

sdk/storage/azure-storage-queue/README.md

@@ -158,7 +158,7 @@ The client performs the interactions with the Queue service, create or delete a
 Once you have the value of the SASToken you can create the queue service client with `${accountName}`, `${SASToken}`.
 ```Java
 String queueServiceURL = String.format("https://%s.queue.core.windows.net", accountName);
-QueueServiceClient queueServiceClient = new QueueServiceClientBuilder().endpoint(queueServiceURL).credential(SASToken).buildClient();
+QueueServiceClient queueServiceClient = new QueueServiceClientBuilder().endpoint(queueURL).sasToken(SASToken).build();
 
 QueueClient newQueueClient = queueServiceClient.createQueue("myqueue");
 ```
@@ -168,7 +168,7 @@ or
 ```Java
 String queueServiceAsyncURL = String.format("https://%s.queue.core.windows.net/", accountName);
 QueueServiceAsyncClient queueServiceAsyncClient = new QueueServiceClientBuilder().endpoint(queueServiceAsyncURL)
-.credential(SASToken).buildAsyncClient();
+.sasToken(SASToken).buildAsyncClient();
 queueServiceAsyncClient.createQueue("newAsyncQueue").subscribe(
     result -> {
       // do something when new queue created
@@ -189,7 +189,7 @@ A single queue message can be up to 64 KB in size, and a queue can contain milli
 Once you have the value of the SASToken you can create the queue service client with `${accountName}`, `${queueName}`, `${SASToken}`.
 ```Java
 String queueURL = String.format("https://%s.queue.core.windows.net/%s", accountName, queueName);
-QueueClient queueClient = new QueueClientBuilder().endpoint(queueURL).credential(SASToken).buildClient();
+QueueClient queueClient = new QueueClientBuilder().endpoint(queueURL).sasToken(SASToken).buildClient();
 
 // metadata is map of key-value pair
 queueClient.createWithResponse(metadata, null, Duration.ofSeconds(30), Context.NONE);
@@ -392,7 +392,7 @@ The operation sets user-defined metadata on the specified queue. Metadata is ass
 Use `${SASToken}` as credential.
 ```Java
 String queueSURL = String.format("https://%s.queue.core.windows.net", accountName);
-QueueClient queueClient = new QueueClientBuilder().endpoint(queueURL).credential(SASToken).queueName("myqueue").buildClient();
+QueueClient queueClient = new QueueClientBuilder().endpoint(queueURL).sasToken(SASToken).queueName("myqueue").buildClient();
 
 Map<String, String> metadata =  new HashMap<String, String>() {{
     put("key1", "val1");