Let travis test java, python2 and python3 independently
Let travis test java, python2 and python3 independently

It will now run the tests in a java environment and independently do the
panlint tests in a python2 and python3 environment.

quattor/pan,quattor/pan,jrha/pan,jrha/pan,jrha/pan,jrha/pan,quattor/pan,jrha/pan,quattor/pan,quattor/pan