Change coveralls to point to master branch
Change coveralls to point to master branch

tswast/java-docs-samples,GoogleCloudPlatform/java-docs-samples,jetty-project/java-docs-samples,ErinJoan/mostly_empty_directory,jetty-project/java-docs-samples,GoogleCloudPlatform/java-docs-samples,GoogleCloudPlatform/java-docs-samples,ErinJoan/mostly_empty_directory,dylanzika/java-docs-samples,ankit318/appengine-samples,tswast/java-docs-samples,jetty-project/java-docs-samples,GoogleCloudPlatform/java-docs-samples,marcgel/java-docs-samples,ErinJoan/mostly_empty_directory,GoogleCloudPlatform/java-docs-samples,ErinJoan/mostly_empty_directory,jetty-project/java-docs-samples,GoogleCloudPlatform/java-docs-samples,tswast/java-docs-samples,tswast/java-docs-samples,jetty-project/java-docs-samples