
This commit now allows user to specify 'prefix_delegation' as a Subnetpool during Subnet creation by using the new --use-prefix-delegation option so that the IPv6 prefixes can be delegated to routers set up by the cloud admins. Change-Id: I67e5d81c4155db2e3c5c41ee1df77f2d77a17689 Closes-Bug: #1513894