This patch set adds the --wait flag to the share group
operation. This will make the CLI to wait for the
operation to be completed before returning to the prompt.
Updated test_share_group_create to be test_share_group_create_wait
and included the waiter flag
Partial-Bug: #1898318
Change-Id: Id3e163de48bdd918ae55438d812187ba4d5461c9