Update README.md

Author: mahendya1002

README.md

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 # CyberSource Simple Order API for Java
 
-[![Build Status](https://travis-ci.org/CyberSource/cybersource-sdk-java.png?branch=future)](https://travis-ci.org/CyberSource/cybersource-sdk-java)
+[![Build Status](https://travis-ci.org/CyberSource/cybersource-sdk-java.png?branch=master)](https://travis-ci.org/CyberSource/cybersource-sdk-java)
 
 ## Package Managers