This patch provides Tacker documents for enhance operations(heal,
scale, update, changeextconn) in V2-API. The specification about new
API is added to API Reference. Also, update operation is added to
Tacker Use Cases Guide and CLI Reference.
This patch also includes changes to the user data script.
Implements: blueprint support-nfv-solv3-change-external-connectivity
Implements: blueprint support-nfv-solv3-heal-vnf
Implements: blueprint support-nfv-solv3-modify-vnf
Implements: blueprint support-nfv-solv3-scale-vnf
Change-Id: I6adefc59903a4c8305a66c224c086af4b86812df
cabb474908