Implement 'manage share' feature in ZFSonLinux share driver.
Prerequisites:
- share being managed should exist.
- share being managed should not be part of any replication relations.
- share being managed should not have redefined mountpoint.
Details:
- share being managed will be renamed by share driver based on taken ID.
- share being managed will get "quota" attribute set based on provided
value in API (--driver_options size=5) or it will set quota
to nearest bigger rounded integer of already
used space (2,4 -> 3, 3.6 -> 4).
Implements blueprint zfsonlinux-manage-share
DocImpact
Change-Id: I03eab5e02835fe660dde0020601c02c0136bddeb
f284db4e07