when the source share has ``snapshot_support`` False.
The message said that the back end lacks snapshot support but this
is not necessarily the case.
Closes-bug: #1925342
Change-Id: I09a83b63528c0988f3601dfd07ad6972165cb855
(cherry picked from commit be29805859)
(cherry picked from commit fb5a4f936d)
(cherry picked from commit fa9ac6d782)