Fully drop 2.6 support

Now that we require puppet 2.7+ we no longer need the create_resources
module and can rely on the built in. The other module bumps update
travis to drop 2.6 support.

(cherry picked from commit 2508494f3b64220dfffbbd5e5f4c11ec02a719ab)
Bump our modules for 1.4.0-RC2

(cherry picked from commit a5395343f937c82a17d32157fea8fcd88c3f7c05)
Release 1.4.0-RC2