92a40c9c1c
This adds release '9.1' to the list of releases for doing rolling upgrades. This also changes the 'pike' release to point to '9.1' since we are considering 9.1 as the official pike release. In actuality, it makes no difference since the rpc & object versions are the same for both 9.0 and 9.1 Change-Id: Id7913a56cd0848a68708a91e6ad055bdee08b465