Test the ETSI package management notification for end-to-end ETSI package management from SDC to SVNFM (VNFM Simulator)

For this test, the following ETSI Catalog Manager bugs need to be fixed:

• https://jira.onap.org/browse/MODELING-352 (ETSI Catalog Manager needs to trigger a notification after storing ETSI packages)
• https://jira.onap.org/browse/MODELING-353 (ETSI Catalog Manager needs to raise 303 exception for the same callback_uri and the same filter