Run integration tests against MongoDB 3.4.X

[domodwyer]

Currently we run integration tests against the 2.6.X, 3.0.X and 3.2.X releases of MongoDB.

We should also run against 3.4.X - this is tricky as the test harness is difficult to work with.

If anyone wants to take a crack at it we're happy to host the binaries as we do for the other versions, see travis.yml - just leave a message below and we'll get the latest version uploaded.

[feliixx]

I'll try to make the test pass against 3.4.x, please let me know when the binaries are uploaded !

[domodwyer]

Hey @feliixx

The integration tests on 3.4.X are a bit of a priority if we're adding more 3.4.X features (mostly by you!), thanks very much. The test harness is a bit tricky to work with, I was going to look at replacing it with mlaunch from the mtools script collection to try and make it easier to work with - I dunno if this will work (it might even be harder to replace the whole lot) but might be worth checking - up to you.

If you run into any trouble let me know and I'll help where I can, again, thanks!

The binary is here, you can add:

- GO=1.8.x MONGODB=x86_64-3.4.8

to the env.matrix array in .travis.yml to get it to run (you might want to remove the others for testing - they take a while).

Best of luck!
Dom