Include ruby without class declaration

  Class[robby::ruby] was using a class declaration to include the top
  level ruby class.  This is a problem since why already include ruby
  higher up in the classification stack using and include.  This commit
  converts this declartion to an include so the catalog can compile.
Deploy the robby user as a system user.

  This commit will make it so that puppet deploys the robby user as a
  system user, much the same was a native package would do.  This
  reduces the chance that the robby user will end up with a conflicting
  uid number with an actual person.