Use X server of travis node

[furushchev]

Some servers on travis fails to bootup X server.
(I suspect that newer version of travis worker prevents launching X server on docker on travis)
So I changed to start X server on host side and use it through docker.

Also add test that uses camera plugin that needs screen rendering.

[furushchev]

It looks that after jade we cannot test camera image on gazebo installable from ros repo.
https://bitbucket.org/osrf/gazebo/issues/1837/vmware-rendering-z-ordering-appears-random

I also confirmed that on Ubuntu 16.04 / kinetic / gazebo7, gazebo crashes when a model with camera is spawned only on testing.

[furushchev]

For testing gazebo on travis / jenkins with ROS jade or later, we will have to add gazebo ppa from OSRF and use the latest gazebo (>= 7.4.0). (for detail please see the link I posted)
@k-okada How do you think of it?

[k-okada]

at this moment, we can skip gazebo test for J/K/...

…

-- ◉ Kei Okada 2017-02-16 20:11 GMT+09:00 Furushchev <notifications@github.com>:

For testing gazebo on travis / jenkins with ROS jade or later, we will have to add gazebo ppa and use the latest gazebo (>= 7.4.0). (for detail please see the link I posted) @k-okada <https://github.com/k-okada> How do you think of it? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#323 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAeG3FM9Bzbnj2Q94STEqV-2kROq2Ywwks5rdC7TgaJpZM4L-IJ0> .

[furushchev]

@k-okada OK.

[k-okada]

@furushchev we found we need to shutdown X server on travis test -> jsk-ros-pkg/jsk_roseus#527
This only happens on master branch and all master branch has been failed (https://travis-ci.org/jsk-ros-pkg/jsk_roseus/branches), until we merge jsk-ros-pkg/jsk_roseus#527
I'm not sure why this happens only jsk_roseus repository, but if we found similar problem on other packages, we'd better to stop X server end of travis.sh file

[furushchev]

@k-okada Thank you for information! We also use X server on other projects (to run gazebo) and we don't yet see this problem, but if I find any other information, let you know. 👍

[furushchev]

@k-okada Is it better to create PR to stop X server for jsk_travis?