+ handle saving HAS_MANY relation automatically in the most simple case
+ moved relation handling behaviour into core
+ set OCT element to use core relation handling behaviour
+ Comorbidities automatically handle many many relations
+ remove redundant controller code for VA and OCT
+ handle related deletes in VA, OCT and Comorbidities
Merge branch 'feature/autorelations' into develop
+ updates to standards compliant properties for auto relation support