End duplication of Cassandra schema definitions by defining them in a script
Merge pull request #2 from Metaswitch/schemas

[Reviewer: Andy] End duplication of Cassandra schema definitions by defining them in a sc...
Fixes for when no HSS is configured. In particular, don't send MAR to HSS when cache doesn't return an AV - we only queried the cache because we don't have an HSS configured.
Merge pull request #3 from Metaswitch/NoHSS

Reviewer Ellie: Fixes for when no HSS is configured.
Merge remote-tracking branch 'origin/master' into cache_mock