Make sudo required in .travis.yml

[tiwanari]

This PR makes sudo enabled in CI. This was suggested by a Customer Support Specialist of Travis to make CI more stable in an e-mail I received after asking why it failed randomly ( #49 ). At least, it passed in a build.

I had a look at your build and I can see that it's running on our container-based infrastructure. Other users have reported more stable builds on our sudo-enabled infrastructure, would you like to give this a try? Here's what you need to add to your .travis.yml file:

sudo: required

One major difference is that the sudo-enabled VMs have 7.5 GB of RAM instead of 4 GB (shared) on the container-based infrastructure.

Please let us know the result and we will follow-up upon your reply.

[tiwanari]

I don't know but it seemed to make testing faster 🎉

[makotoshimazu]

That makes sense because sudo tests won't deploy the environment on the container according to the explanation.

2016年12月12日(月) 14:59 Tatsuya Iwanari notifications@github.com:

I don't know but it seemed to make testing faster 🎉

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