Run Travis with different "mvn"-Versions

[TheSnoozer]

Hi,
since we can change a lot of underlying stuff like java version, go, ruby and many other stuff it would be nice if we could run the build with different "mvn"-Versions by adding them to the travis yaml.
However, it seems that the travis-yml currently does not recognize mvn nor maven and furthermore this request does not seem to be supported by travis-ci.

Maybe I'm wrong but it sounds reasonable to also add mvn because $vendor changes stuff and we need to test it :-)

Any help and progress on this is highly appreciated.

Thanks