Change the ONBOARDED_PACKAGE directory to the ETSI_PACKAGE directory

• the ETSI_PACKAGE directory is a common directory for both onboarded and designed ETSI packages

The ONBOARDED_PACKAGE is created to store the original onboarded package inside the generated SDC CSAR.

Onboarding:

This package will be now ETSI_PACKAGE. So new onboarded packages will be stored in that folder.

TOSCA CSAR Generation:

Also, any generated artifact during the TOSCA CSAR generation must have the ETSI_PACKAGE artifact folder instead ONBOARDED_PACKAGE. So legacy included VFs in the topology must have their Artifact folder ONBOARDED_PACKAGE changed to ETSI_PACKAGE folder during the TOSCA CSAR generation.

Example:

The current csar structure is as follows:

ONAP Service CSAR
  |-- Artifacts
        |-- NSD
              |-- etsi nsd csar
        |-- <VF 1>
              |-- Deployment
                    |-- ONBOARDED_PACKAGE
                          |-- etsi vnf package
            ...
        |-- <VF n>
              |-- Deployment
                    |-- ONBOARDED_PACKAGE
                          |-- etsi vnf package

The desired is (renaming "NSD" and "ONBOARDED_PACKAGE" above to "ETSI_PACKAGE"):
                         
ONAP Service CSAR
  |-- Artifacts
        |-- ETSI_PACKAGE
              |-- etsi nsd csar
        |-- <VF 1>
              |-- Deployment
                    |-- ETSI_PACKAGE
                          |-- etsi vnf package
            ...
        |-- <VF n>
              |-- Deployment
                    |-- ETSI_PACKAGE
                          |-- etsi vnf package