Add a travis.yml file to configure how travis should build jmeter.
Add a travis.yml file to configure how travis should build jmeter.

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1732929 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: 3f3e3ef211be91ddbff6a32993f9c03ce436d220
ham1/jmeter,apache/jmeter,benbenw/jmeter,ham1/jmeter,apache/jmeter,benbenw/jmeter,ham1/jmeter,etnetera/jmeter,etnetera/jmeter,apache/jmeter,etnetera/jmeter,ham1/jmeter,etnetera/jmeter,ham1/jmeter,benbenw/jmeter,apache/jmeter,etnetera/jmeter,benbenw/jmeter,apache/jmeter