Storage - Blobs NIO ReadMe and Samples issues

[v-hongli1]

1. Section link
   

Reason:

1. java.lang.IllegalArgumentException: URI does not contain an "endpoint=" parameter. FileSystems require a URI of the format "azb://?endpoint="
2. java.lang.IllegalArgumentException: There was an error parsing the configurations map. Please ensure all fields are set to a legal value of the correct type.

Suggestion:
Change to

    private static final String CONTAINER_STORES = "dir,file"; // A comma separated list of container names
    private static final StorageSharedKeyCredential SHARE_KEY_CREDENTIAL
            = new StorageSharedKeyCredential("<account_name>", "<account_key>");
    private static final Map<String, Object> CONFIG = new HashMap<String, Object>(){{
        put(AzureFileSystem.AZURE_STORAGE_SHARED_KEY_CREDENTIAL, SHARE_KEY_CREDENTIAL);
        put(AzureFileSystem.AZURE_STORAGE_FILE_STORES, CONTAINER_STORES);
    }};
    private FileSystem myFs = FileSystems.newFileSystem(new URI("azb://?endpoint=<account_endpoint>"), CONFIG);

@joshfree, @tg-msft, @kyle-patterson and @rickle-msft for notification.

[rickle-msft]

@hongli750210 Thank you for reporting this. I'll add this now.