Switch all internal code from deprecated modules to build_graph.
Review Request #2909 - Created Sept. 30, 2015 and submitted
|kwlzn, mateor, zundel|
So we no longer see deprecation messages for this.
A large but completely mechanical change. Feel free to rubber-stamp the review. The proof of the pudding will be in the CI passing...
CI passed: https://travis-ci.org/pantsbuild/pants/builds/82986628