The dynamic nature of our object model is going to cause lots of
heartache for pylint, especially in the actual definitions. This
just excludes that whole directory from pylint's view, which will
limit the heartache to only everywhere objects are actually used.
Related to blueprint unified-object-model
Change-Id: I7f1a4b10b8a5098aab2ab2e8ea5da15ec43f0e2e