Tableau Server REST API 3.1 updates to samples (tableau#32)

* Update README.md

Update version number to 3.1

* Update RestApiUtils.java

Update version number to 3.1

* Update README.md

Update version number to 3.1

* Update version.py

Update version number to 3.1

* Update README.md

Minor typo fix

Author: aaroncarey

java/README.md

@@ -31,13 +31,13 @@
    For example, you might see the following URL:
 
    ```
-   /api/3.0/
+   /api/3.1/
    ```
 
-   If you want to use version 2.8 of the API, replace the URL with the following:
+   If you want to use version 3.0 of the API, replace the URL with the following:
 
    ```
-   /api/2.8/
+   /api/3.0/
    ```
 
 ## Running the sample

java/src/com/tableausoftware/documentation/api/rest/util/RestApiUtils.java

@@ -110,7 +110,7 @@ public static RestApiUtils getInstance() {
      * @return the URI builder
      */
     private static UriBuilder getApiUriBuilder() {
-        return UriBuilder.fromPath(m_properties.getProperty("server.host") + "/api/3.0");
+        return UriBuilder.fromPath(m_properties.getProperty("server.host") + "/api/3.1");
     }
     /**
      * Initializes the RestApiUtils. The initialize code loads values from the configuration

python/README.md

@@ -10,8 +10,8 @@ Running the samples
 * All samples require 2 arguments: server adress (without a trailing slash) and username
 * Run by executing ```python sample_file_name.py <server_address> <username>```
 * Specific information for each sample are included at the top of each file
-* API version is set to 3.0 by default for Tableau Server 2018.1, but it can be changed in [version.py](./version.py)
-* For Tableau Server 9.0, the REST API namespace must be changed (refer to comment in each sample where namespace, xmlns, is defined)
+* API version is set to 3.1 by default for Tableau Server 2018.2, but it can be changed in [version.py](./version.py)
+* For Tableau Server 9.0, the REST API namespace must be changed (refer to the comment in each sample where the namespace, `xmlns`, is defined)
 
 REST API Samples
 ---------------

python/version.py

@@ -1 +1 @@
-VERSION = '3.0'
+VERSION = '3.1'