fix setSaltOverrides - missing variable

Change-Id: I2679afee772d6b60a95c6fefb5bb37da189bad2d
diff --git a/src/com/mirantis/mk/Salt.groovy b/src/com/mirantis/mk/Salt.groovy
index 2fdc0b3..2c4734e 100644
--- a/src/com/mirantis/mk/Salt.groovy
+++ b/src/com/mirantis/mk/Salt.groovy
@@ -442,7 +442,7 @@
     def common = new com.mirantis.mk.Common()
 
     def salt_overrides_map = mcpcommon.loadYAML(salt_overrides)
-    for (entry in common.entries(SALT_OVERRIDES_MAP)) {
+    for (entry in common.entries(salt_overrides_map)) {
          def key = entry[0]
          def value = entry[1]