puppetlabs/puppet — pull request #3192 by igalic (2014-10-14 17:57:58+00:00)
Title: do not switch uid/gid if it's already the same

this addresses [PUP-3457](https://tickets.puppetlabs.com/browse/PUP-3457): if the uid/gid is already the one we're
supposed to switch to, do not attempt to switch, just return.