CDS integration with SDC (VF/PNF Resource artifact upload screens)

CDS needs to be integrated in a better way with SDC.

Currently:
CBA artifact is created in CDS, it needs to be exported, and imported to a VF/PNF resource configuration, as an artifact. That is error prone (different versions of files, aso).

Proposed enhancement:
Implement a CBA browser, using integrated CDS instance - and add this option to select an existing CBA to SDC. This will be an alternative to existing file upload mechanism, that is going to stay in ONAP/SDC.

In order to keep both approaches synchronized, after a CBA artifact is selected in that new GUI, it will be downloaded and stored into a Service Model CSAR package. That has to be done by SDC internally (downloading, and storing in Service Model CSAR).

Optionally - CDS GUI to be available as an SDC plugin (similar as DCAE-DS or Workflow Designer).