Sort the options in the tun config.

When creating a tun config with more than one global option using ruby 1.8 ( the default on ubuntu 12.04) it returns the hash in a random order. This means that the config file changes on most puppet runs and the service restarts.
This just sorts the options by name before looping though keeping them consistent.
Merge branch 'patch-1' of https://github.com/choffee/puppet-stunnel into choffee-patch-1
workaround for rspec > 3.0.0 and rspec-puppet not playing nicely.
Merge branch 'choffee-patch-1'