install: add support for native ssl command

The code should auto-select the native ssl method if the ssl command is available on the UPS.

If this fails, install will drop back to the original install method used by this tool (which works on NMC2).

pkg/app/cmd_create.go

@@ -31,7 +31,7 @@ func (app *app) cmdCreate(_ context.Context, args []string) error {
 	// validation done
 
 	// make p15 files
-	apcKeyCertFile, keyFile, err := app.pemToAPCP15s(keyPem, certPem, "create")
+	keyFile, apcKeyCertFile, err := app.pemToAPCP15(keyPem, certPem, "create")
 	if err != nil {
 		return err
 	}