Adding RHEL support for puppet-sahara

Adding a section to install for redhat-based
systems.
* adding require mysql::server
* adding sahara-api-redhat.erb template
* adding section to install that uses the new
  template to build an init.d script
* updates for compatibility with latest versions
  of puppet modules
  

Change-Id: Idecde095040cf2ed31f81ac058aed526224aa73e
Closes-Bug:  bug 1295342