Fixed working with keys in salt print result

Change-Id: I1b1436015d7cc033b4c5e0bca644736919240bd0
diff --git a/src/com/mirantis/mk/Salt.groovy b/src/com/mirantis/mk/Salt.groovy
index 2bc6fb9..eebdf0c 100644
--- a/src/com/mirantis/mk/Salt.groovy
+++ b/src/com/mirantis/mk/Salt.groovy
@@ -283,12 +283,12 @@
                         resKey = k
                     }
                     resource = node[resKey]
-                    common.errorMsg("Checking resource: ${res}")
+                    common.errorMsg("Checking resource: ${resource}")
                     if(!resource["result"] || (resource["result"] instanceof String && resource["result"] != "true")){
                         if (failOnError) {
-                            throw new Exception("Salt state on node ${nodeKey} failed: ${res}. State output: ${node}")
+                            throw new Exception("Salt state on node ${nodeKey} failed: ${resource}. State output: ${node}")
                         } else {
-                            common.errorMsg("Salt state on node ${nodeKey} failed: ${res}. State output: ${node}")
+                            common.errorMsg("Salt state on node ${nodeKey} failed: ${resource}. State output: ${node}")
                         }
                     }
                 }