[CI] Add a Travis config using industrial_ci.
[CI] Add a Travis config using industrial_ci.

Add a config file for Travis CI, for automated testing. Please see more about what can be checked [doc](https://github.com/ros-industrial/industrial_ci/blob/master/README.rst). Testcases might be not yet added to the packages here but at minimum we can check if pkgs build, dependency clearance etc.

If this LGTY, any admins could enable Travis (at something like https://travis-ci.org/profile/ros-industrial-consortium) by a single click to get the checking started.

ros-industrial-consortium/reuleaux,ros-industrial-consortium/reuleaux