Release bug fixes for stable/zed.
$ git log --oneline --no-merges 15.0.1..HEAD
d2472678 Fix Producer shard range ignoring the last shard
71743f9f Add middleware to limit request body size to api-paste
87b775ff Fix bug with designate-manage pool update losing existing record data
Change-Id: I12c52b2f2e1056f982f694dc2383343b5aa2c4c2