Since "Migrate share" have been merged, The share['id']
is not consistent with share['name']. So can not use 'share_name'
in create_share API and use 'share_id' in create_snapshot API at
the same time. Now change snapshot['share']['share_id']
to snapshot['share_name'] in create_snapshot API.
Change-Id: Ieedda9318762ba2c683788f023a87728d7287504
Closes-Bug: #1494614