Fix missing import

Change-Id: I45c17a0e6071814a8c8ad6b66c88a41271f72b83
diff --git a/src/com/mirantis/mk/Salt.groovy b/src/com/mirantis/mk/Salt.groovy
index 27a5f0b..5a9d7ce 100644
--- a/src/com/mirantis/mk/Salt.groovy
+++ b/src/com/mirantis/mk/Salt.groovy
@@ -670,6 +670,7 @@
         //TODO: remove wget after global env prop enforcments
         offlineDeployment = sh(script: "wget -q -T 3 --spider http://google.com", returnStatus: true) != 0
       } catch(Exception e) {
+        def common = new com.mirantis.mk.Common()
         common.warningMsg("You might be offline, will use pepper with option --json instead of option --json-file")
       }
     }