Our Pipeline configuration is pretty complex, and we duplicate a lot of

specific settings from Djblets. Now that Djblets has a function for

handling the generation of this standard configuration, we can use it to

build the one in Review Board. This simplifies settings quite a bit and

makes static media compilation and packaging more resilient to

dependency or plugin changes in Djblets.

Successfully collected static media and built a package.
Unit tests pass.