[ONOS-5883] Implemention of Serializer Helper Utility

Change-Id: Ifffcdb1ee6de8dfd1a08df9e0b5473651509a6dd
diff --git a/runtime/src/test/resources/schemaProviderTestYangFiles/list.yang b/runtime/src/test/resources/schemaProviderTestYangFiles/list.yang
new file mode 100644
index 0000000..fcc67eb
--- /dev/null
+++ b/runtime/src/test/resources/schemaProviderTestYangFiles/list.yang
@@ -0,0 +1,37 @@
+module list {
+
+    yang-version 1;
+
+    namespace "yrt:list";
+
+    prefix "l";
+
+    organization "ON-LAB";
+
+    description "This module defines for list.";
+
+    revision "2016-06-24" {
+        description "Initial revision.";
+    }
+
+    list l1 {
+        key "k1 k2 k3";
+            leaf k1 {
+               type string;
+            }
+
+            leaf k2 {
+              type string;
+            }
+
+            leaf k3 {
+              type string;
+            }
+
+            container c1 {
+                leaf l1 {
+                  type string;
+                }
+            }
+    }
+}
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