Extend CCDL validation on receive

[juliangruendner]

Each CCDL (for feasibility) which is posted to the backend should be validated against the current ontology.

Specifically before any feasibility is executed.

Things which should be considered:

• Does the CCDL adhere to the CCDL schema
• Are all the criteria part of the ontology (context + termcode)
• Can all values for attributes and values of type codeable concepts be found in the value sets defined in the ui_profile of the criterion
• if value type is quantity, are the units from the allowed list
• if value type is quantity are the values numbers