* Added a new db script to add new db tables needed for vnf packages.
* Added new db models for vnf packages.
Partial-Implements: blueprint tosca-csar-mgmt-driver
Co-Author: Neha Alhat <neha.alhat@nttdata.com>
Change-Id: Ib754c6cab2de5ffb8932ef66e7c17bd20e34c16b