Implement UserID in snapshot list response

We have a gap in the microversions implemented in the cinderclient
and the MAX version being reported by the client.

One of those is the addition of "user_id" in the snapshot list
response.  This patch adds that with the appropriate version
checking.  Note that the Max version has already been updated,
but there are a few implementations missing.

Change-Id: Ia8bdb46b46091a89996e404825466430b8906d18
Partial-Bug: #1715759

cinderclient/tests/unit/v3/test_shell.py

@@ -998,3 +998,12 @@ class ShellTest(utils.TestCase):
         cmd += '1234'
         self.run_command(cmd)
         self.assert_called('POST', '/backups')
+
+    @mock.patch("cinderclient.utils.print_list")
+    def test_snapshot_list_with_userid(self, mock_print_list):
+        """Ensure 3.41 provides User ID header."""
+        self.run_command('--os-volume-api-version 3.41 snapshot-list')
+        self.assert_called('GET', '/snapshots/detail')
+        columns = ['ID', 'Volume ID', 'Status', 'Name', 'Size', 'User ID']
+        mock_print_list.assert_called_once_with(mock.ANY, columns,
+                                                sortby_index=0)

cinderclient/v3/shell.py

@@ -1722,6 +1722,12 @@ def do_snapshot_list(cs, args):
                                          sort=args.sort)
     shell_utils.translate_volume_snapshot_keys(snapshots)
     sortby_index = None if args.sort else 0
+    if cs.api_version >= api_versions.APIVersion("3.41"):
+        utils.print_list(snapshots,
+                         ['ID', 'Volume ID', 'Status',
+                          'Name', 'Size', 'User ID'],
+                         sortby_index=sortby_index)
+    else:
         utils.print_list(snapshots,
                          ['ID', 'Volume ID', 'Status', 'Name', 'Size'],
                          sortby_index=sortby_index)