Run the tests in a xenial LXC.

[elopio]

Fixes LP: #1532213

[elopio]

The examples tests are failing because of https://bugs.launchpad.net/ubuntu/+source/make-dfsg/+bug/1536727.
Our idea has been always to run them in Jenkins because there we can access the daily snappy installed on a cloud instance and run also the internal and external commands. The job for that is ready, but pending a Jenkins redeploy. In the meantime if needed, I will be running the example suite locally.

[kyrofa]

Yuck.

[elopio]

indeed. Most of the ugliness comes from travis preinstalling a lot of stuff in the trusty vms. The problem now is with postgresql, but could happen with many of the other things if they fail to upgrade or start. We need none of them, so it's generally safe to ignore the errors. And if there's an error that affects us, the test will fail below.

[kyrofa]

Looks good to me.

[elopio]

@sergiusens waiting for you +0.02 here.

[sergiusens]

Are you afraid of utf-8? 😄

[elopio]

of course :)

[sergiusens]

aha! privileged

[elopio]

yup, but it didn't make any difference in the end. I was trying to use it to get rid of the chmod 777.
I still want to get rid of it, but I prefer to keep trying in a different PR.

[sergiusens]

👍

[elopio]

I'm so very happy that it finally landed. 🍻

[kyrofa]

Hey! Congratulations @elopio!