Supported the following operations to get the VNF package
information from NFVO when starting LCM operation.
- VNF packages (GET)
- VNF package content (GET)
- VNFD in an individual VNF package (GET)
- Individual VNF package artifact (GET)
Implements: blueprint support-vnfm-operations
Spec: https://specs.openstack.org/openstack/tacker-specs/specs/victoria/support-sol003-vnfm-operations.html
Change-Id: Ibdafdda815f8e130226b9d8eef4f18639f01292c