Add cluster volume support

- Write test for cluster volumes
- Add inspect test, add update command
- Add cluster volume opts to create
- Add requisite and preferred topology flags
- volume: move cluster bool in opts

Signed-off-by: Drew Erny <derny@mirantis.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/volume/cmd.go

@@ -21,6 +21,7 @@ func NewVolumeCommand(dockerCli command.Cli) *cobra.Command {
 		newListCommand(dockerCli),
 		newRemoveCommand(dockerCli),
 		NewPruneCommand(dockerCli),
+		newUpdateCommand(dockerCli),
 	)
 	return cmd
 }