NOTE: Need to add this to 2.15.1 patch release

See comments in JIRA

Keep support for V4 and add support for V5

This will require dependancy changes
Open question - can both versions be imported?

Upgrade testing - what happens when you upgrade from 4.15 to 4.16 - probably need to upgrade grafana also.
Might need a guide for customers - may need to add new fields etc to Grafana CRs