Decreased verbosity of salt-calls

Change-Id: I181fc3f2b25a979f62a10b785b3cbcb465eabd46
diff --git a/src/com/mirantis/mk/Salt.groovy b/src/com/mirantis/mk/Salt.groovy
index c3995d5..eeda9c4 100644
--- a/src/com/mirantis/mk/Salt.groovy
+++ b/src/com/mirantis/mk/Salt.groovy
@@ -744,7 +744,7 @@
     }
 
     if (venv) {
-        output = python.runVirtualenvCommand(venv, pepperCmd)
+        output = python.runVirtualenvCommand(venv, pepperCmd, true)
     } else {
         echo("[Command]: ${pepperCmd}")
         output = sh (