[bugfix] Fix `remote_sources()` targets dependency injection.
Review Request #4052 - Created July 6, 2016 and submitted
|jsirois, stuhood, zundel|
The deferred sources mapper was failing to inject the dependencies for the synthetic targets made from `remote_sources()` targets. This behavior wasn't previously tested, so of course it was broken. Now it's tested.
Extended existing tests to cover this functionality.
CI went green here: https://travis-ci.org/pantsbuild/pants/builds/142805027