(PUP-987) Cleanup {} around .pp in path
(PUP-987) Remove test that ended up testing nothing but its own mocking

Removed test that ended up testing that the puppet parser does not barf
on an empty.rb file
(PUP-987) Remove additional references to ruby_code and .rb manifests

command_line.rb handled .rb manifests from the command line.
and resource/type.rb still had the ruby_code attribute.
Unit tests checked that the attribute existed (but nothing else).