Insert Manager

[ineiti]

Work to do

213 is getting ready for code review. Here the findings so far:

• [x] GaenControllerTestNotThreadSafe.java - it reproduces some of the errors fixed in #220 - we need to make sure these errors are not inserted again. In the best case, reverting to the tests that are now in develop should make it pass. -> @ineiti verify that the test zipContainsFiles is in GaenControllerTest.java and working correctly.
• [x] GaenControllerTest - I'm not sure what is the correct User-agent to use - but if it's the Android one, that should go into a class variable.
• [x] InsertManager - needs some class documentation - @wouterl writes: Nice! Maybe just write one or two lines of documentation here. Something that says "only accept keys that look valid". And maybe a ref to the modifiers if enabled. That's only the configuration - discuss in #235 whether it's necessary or not.
• [x] Code review - @wouterl asked for some days for an internal review of what is happening here.

Merging

Now #213 depends on #230, so:

first REBASE #230 into develop then, once #213 is ready, REBASE #213 into develop

[ineiti]

In fact @wouterl wrote For now, it should be ok to merge this. on slack - so we should be go for this, once 230 is rebased on develop, and this is rebased on develop.