Update Travis configuration (#121)

* update travis badge

* update travis testing environments

Author: adavidw

.travis.yml

@@ -5,10 +5,13 @@ sudo:
     false
 
 jdk:
-  - oraclejdk8
-  - oraclejdk7
-  - openjdk7
-  #- openjdk6
+    - oraclejdk8
+    - oraclejdk9
+    - openjdk7
+
+matrix:
+    allow_failures:
+        - jdk: oraclejdk9
 
 before_script:
   - git submodule update --remote --recursive

README.md

@@ -1,6 +1,6 @@
 # Authorize.Net Java SDK
 
-[![Travis](https://img.shields.io/travis/AuthorizeNet/sdk-java/master.svg)](https://travis-ci.org/AuthorizeNet/sdk-java)
+[![Travis CI Status](https://travis-ci.org/AuthorizeNet/sdk-java.svg?branch=master)](https://travis-ci.org/AuthorizeNet/sdk-java)
 [![Code Climate](https://codeclimate.com/github/AuthorizeNet/sdk-java/badges/gpa.svg)](https://codeclimate.com/github/AuthorizeNet/sdk-java)
 [![Maven Central](https://img.shields.io/maven-central/v/net.authorize/anet-java-sdk.svg?style=flat)](http://mvnrepository.com/artifact/net.authorize/anet-java-sdk)