Change TTL indexes to packet.added key

[schwing]

• Change index key from packet to packet.added on the will, outgoing, and incoming collections.

Fixes https://github.com/moscajs/aedes-persistence-mongodb/issues/50

[robertsLando]

@schwing I would add a test here too: https://github.com/moscajs/aedes-persistence-mongodb/blob/master/test.js#L517

Just add some packets to other collections and check if them are removed like we are doing with retained collection now

[schwing]

@robertsLando Thanks, I didn't notice those other tests before. I've added tests for all the collections there and also for the index tests for better coverage.

I'm unable to reproduce the latest CI test failures shown for 10.x or 13.x here. Is this possibly a timing issue where ready is sometimes emitted prior to indexes being created because the createIndex() calls don't wait for callbacks here? https://github.com/moscajs/aedes-persistence-mongodb/blob/master/persistence.js#L97-L116

[robertsLando]

Is this possibly a timing issue where ready is sometimes emitted prior to indexes being created because the createIndex() calls don't wait for callbacks here?

It could be the reason, could you try to fix that?

[robertsLando]

@schwing I think it would be better to add callbacks support for create index. YOu could use fastparallel https://www.npmjs.com/package/fastparallel

[schwing]

@robertsLando Agreed. I'll add that.

[schwing]

Added and tests look good now. I attempted to match style with the rest of the module. Let me know any thoughts.

[robertsLando]

@schwing Just released a new patch version with this fix :+1:

[schwing]

Great! Thanks for all the assistance here.