
Add ``openstack vnflcm change_vnfpkg`` to python-tackerclient. This command can execute change current vnf package operation [1]. [1] https://www.etsi.org/deliver/etsi_gs/NFV-SOL/001_099/003/03.03.01_60/gs_NFV-SOL003v030301p.pdf Implements: blueprint upgrade-vnf-package Change-Id: I0d9c88147dee3a273cb27224db6be6c91cf7fe55