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.
This is going to expose how hard I find bash commands to read, but couldn't we just do:

```
sudo sed -i '1iMAX_HEAP_SIZE=512M\nHEAP_NEWSIZE=48M\n' /etc/cassandra/cassandra-env.sh
```