Update ruby to 1.9.3-p547

* Updated .ruby-version for version managers
* Updated url's for ubuntu iso's (old-releases now)
* Converged on one ruby in the chef recipes

[#71367862]

Signed-off-by: Michael Fraenkel <fraenkel@us.ibm.com>
Merge branch 'ruby-p545' of https://github.com/sykesm/bosh-lite into sykesm-ruby-p545

Conflicts:
	site-cookbooks/bosh-lite/recipes/rbenv.rb
Merge branch 'sykesm-ruby-p545'