[Hawkular-dev] Removal of embedded Cassandra

[Juraci Paixão Kröhling]

Team,

As mentioned on IRC, we should not ship an embedded Cassandra with 
Hawkular Services. Here are a couple of approaches we can follow to 
accomplish that:

- Keep everything as is, but change the default value for 
`hawkular.backend` to `remote` instead of the current `embedded_cassandra`

- Remove the embedded Cassandra entirely from Nest. This has 
implications on how the integration tests are executed: we'd need to 
ensure that each integration test suite starts an embedded Cassandra 
before the test is executed. Or use an approach like Metrics, which 
requires Cassandra to be running before the tests are started.

Which approach should be the one to follow?

- Juca.