Comment 3 for bug 1476261

I've put some initial work into fixing it[1][2][3][4], and I can build current master with -j25. It's an ongoing effort, especially with Scons 2.5 being more robust in detecting circular dependencies, but I should be able to push those upstream soonish[tm].

[1] https://github.com/kklimonda/contrail-build/commit/c937af2af23697d13f6383b326bd98a25b1d76ca
[2] https://github.com/kklimonda/contrail-controller/commit/a6bffb30e210193cfb8a78a4567dea820f361feb
[3] https://github.com/kklimonda/contrail-controller/commit/481ae952f9dbfcfede95926ac91cf2494922ff2a
[4] https://github.com/kklimonda/contrail-controller/commit/bbf22cc5a4aaece17db3d8e65b669be98d1c65fb