Remove rspec deprecation warning
Remove rspec deprecation warning

Use `Rspec.configure` to remove deprecation warning when running the spec
tests.

MelanieGault/puppetlabs-registry,DSI-Ville-Noumea/puppetlabs-registry,jpogran/puppetlabs-registry,cyberious/puppetlabs-registry,zshahan/puppetlabs-registry,puppetlabs/puppetlabs-registry,ferventcoder/puppetlabs-registry