Fix play to show up in podman help

Also change generate cli calls to match other commands.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

cmd/podman/commands.go

@@ -16,8 +16,9 @@ func getMainCommands() []*cobra.Command {
 		_createCommand,
 		_diffCommand,
 		_execCommand,
-		generateCommand.Command,
+		_generateCommand,
 		_containerKubeCommand,
+		_playCommand,
 		_psCommand,
 		_loginCommand,
 		_logoutCommand,