Removed usage of mcp.Common YML methods

Change-Id: I3747ff970eb2ec469b08c0a63893bfe1ff0cff00
diff --git a/src/com/mirantis/mk/Salt.groovy b/src/com/mirantis/mk/Salt.groovy
index 71c17d6..87f7c8a 100644
--- a/src/com/mirantis/mk/Salt.groovy
+++ b/src/com/mirantis/mk/Salt.groovy
@@ -626,10 +626,8 @@
  */
 
 def setSaltOverrides(master, salt_overrides, reclass_dir="/srv/salt/reclass") {
-    def mcpcommon = new com.mirantis.mcp.Common()
     def common = new com.mirantis.mk.Common()
-
-    def salt_overrides_map = mcpcommon.loadYAML(salt_overrides)
+    def salt_overrides_map = readYaml(salt_overrides)
     for (entry in common.entries(salt_overrides_map)) {
          def key = entry[0]
          def value = entry[1]