Currently, only the name and public access of share-type is set when the
share-type is created, and not allowed to be edited after the share-type
is created. We can only set extra spec for share-type. This commit
suppport update name,description or public access of share-type.
Change-Id: Ia59ae574482fa8015f0151cd983ef880e180640a
Partially-Implements: blueprint update-share-type-name-or-description