Travis test stability

This PR will:

- clear the data before doing reindexAll
- reduce the amount of memory Cassandra is using
- not let redis write to disk every 10k writes
- truncate the necessary column families before reindexing lots of content
- fix up some before statements
- emit a tenantCreated event from the tenants API which the config api can hook into. I believe this one was the cause of the verify standard resource propagation test failure.
Sorry, didn't realise that we were already in the oae-tests module