Do not mention m1.nano and m1.micro flavors

These are not default flavors; they're created by devstack.

Change-Id: I5306f9036eea5060004e1eeed8389284e964eb2e
Update cinder options for icehouse with latest autohelp

Change-Id: I6ffe35eb2995c76f69ebccb2b5d9a6211b3ff6ce
Merge "Update cinder options for icehouse with latest autohelp"
Merge "Do not mention m1.nano and m1.micro flavors"