Add implicit project name matching

Most project pipelines define jobs for the project they are defined
in. However they still need to name the project explicitly which makes
actions like repo renaming/movement very difficult.

Thus we want to add the project itself as an implicit fallback.

Change-Id: I273a2b3b1ba2a50565624553e3898be2da5611de
Depends-On: I5af74763fc9c4be395a341f28c6751d22bd46195
9 files changed