Add ability to persist `CarePlan` after `$apply`

[tigloo]

I'm using HAPI as FHIR server. I'm making use of PlanDefinitionApplyOperation to create a CarePlan from a PlanDefinition object.

In my use case, I can't trust the client to save the CarePlan object and I want to make sure it's stored without modifications. I'd like to add an additional parameter to the $apply operation (for example hapi.persist = true, false by default) that will cause the CarePlan to be stored immediately and the stored version to be returned.

Is this a change I can submit here or should I rather keep it as a local change?