Prior to this commit, the Gemfile for strings did not specify which
version of rspec to use. When it started using rspec 3, the tests
that relied upon the rspec-html-matchers gem began to fail, likely
because that gem is not yet compatible with the new version of rspec.
Update the Gemfile so that we explicitly use an older version of
rspec to prevent tests from failing. We will have to either wait
for rspec-html-matchers to catch up or find a new way of testing
the HTML output before we can update to rspec 3.
Due to the changes in PUP-3900 which renamed Puppetx to PuppetX
and puppetx to puppet_x, strings was failing since the namespace
had not been updated in strings. In order to be compatible with this
change, update strings by renaming the namespace to match.
In order to ensure strings is still compatible with earlier versions
of puppet that don't include the namespace change, declare our own
PuppetX module. This way, if it is an older version and the namespace
is called Puppetx, the necessary PuppetX namespace will be created.