Extract opaque_keys into a separate library

[cpennington]

No description provided.

[cpennington]

@sarina @flowerhack @dianakhuang

[sarina]

👍 assuming tests pass

[flowerhack]

@cpennington When running this branch locally, paver install_prereqs fails to install opaque_keys (though a direct pip install of opaque_keys works fine). I'm not sure what the problem was but it seems like it might be a concern for production (maybe?)—would @jzoldak know more? I feel that regardless of whether or not it's a blocker for merging, it'd be nice to make sure install_prereqs behaves correctly

[flowerhack]

besides that, 🎋 🍊 ⛵

[jzoldak]

@clytwynec we need to look into this ^ (paver install_prereqs issue)

[sarina]

@jzoldak @clytwynec -- another thing I notice is that paver install_prereqs is run 3x times during the unit test suite. I think it would be worth making it so that does not happen (right now we're just chaining calls to run different suites of tests, each of which first calls install_prereqs).

[jzoldak]

oh, right the install prereqs not picking up would be fixed if we merge in #3487 ?

[cpennington]

This PR should now include the updates from #3487

[sarina]

👍

[flowerhack]

@cpennington it doesn't seem to have the updates from #3487 ? in particular github.txt still isn't included in pavelib, so I'm still seeing the install_prereqs issue

[flowerhack]

(are we still planning to merge #3487 separately...?)

[sarina]

@flowerhack ? #3487 was merged...

[flowerhack]

whups, forgot to pull. @cpennington it works fine now

[cpennington]

The failed test is known to be intermittent. Merging.