Fix call to salt method inside the class itself

Fixes: PROD-28992

Change-Id: I2676220e7b0bbf43f1d0113b04d68575aa8f6bdb
diff --git a/src/com/mirantis/mk/Salt.groovy b/src/com/mirantis/mk/Salt.groovy
index 7688c0e..ca4587e 100644
--- a/src/com/mirantis/mk/Salt.groovy
+++ b/src/com/mirantis/mk/Salt.groovy
@@ -508,7 +508,7 @@
         if (checkAvailability) {
             minionsReachable(saltId, 'I@salt:master', target_reachable)
         }
-        def running = salt.runSaltProcessStep(saltId, target, 'saltutil.running', [], null, true, timeout)
+        def running = runSaltProcessStep(saltId, target, 'saltutil.running', [], null, true, timeout)
         for (value in running.get("return")[0].values()) {
             if (value != []) {
                 throw new Exception("Not all salt-minions are ready for execution")