use uss factory

Author: frankgiordano

src/main/java/zos/shell/command/impl/UssCommand.java

@@ -39,7 +39,7 @@ protected void run(CommandContext ctx, CommandLine cmd) {
         String command = String.join(" ", cmd.getArgList());
 
         var ctrl = ControllerFactories
-                .getGlobalFactory()
+                .getUssFactory()
                 .getUssController(ctx.sshConnection);
 
         String result = ctrl.issueUnixCommand(command);