Ignore modules pulled from r10k into modules/

Prior to this, modules that were deployed with r10k into the ./modules
directory weren't being ignored by git.

When doing local development or testing, it's nice to be able to run
'r10k puppetfile install' to pull down modules from the Puppetfile.
After this commit, those modules won't be tracked by git.

Author: natemccurdy

.gitignore

@@ -1 +1 @@
-hieradata/nodes/example-puppet-master.yaml
+modules/