Add support for making use of package managers

This pull request is an attempt to move the Riak CS, Riak CS Control, and Stanchion recipes off of direct S3 package downloads and onto using package managers like apt and yum.

- [x] Standardize support for setting file descriptor limits
- [x] Change the way Riak CS, Riak CS Control, and Stanchion recipes install packages
- [x] Test changes on Ubuntu
- [x] Test changes on CentOS