add ansible *.retry files to .gitignore

[ak5]

Hi!

First off, thanks for bringing WP into the present, I've been struggling to do so myself for a while now and just stumbled upon your projects - setting up a site with the trellis, bedrock and sage at this moment. I'm impressed by the amounts of features!

This issue is a small nitpick, living in China we have pretty crappy internet and I always end up having .retry files in my repo. Would be nice to have them in .gitignore. That is all.

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add to .gitignore

*.retry

[swalkinshaw]

We'll consider this but in the meantime you can turn them off in your ansible.cfg confg: http://stackoverflow.com/questions/31318881/how-do-you-stop-ansible-from-creating-retry-files-in-the-home-directory