Ignore ruby version config files

Ignore .ruby-{version,gemset} config files

Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>
ignore Gemfile.lock

Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>
Set rspec version to be < 3.0.0

There are some annoying deprecation warnings coming out of rspec-puppet
with rpsec >= 3.0.0 and the version of rspec-puppet that fixes them
hasn't been released yet.

Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>