VOL-2153 move flow_utils.go from voltha-go to voltha-lib-go;
release 2.2.6

Based on voltha-go commit ec6e61b6239b955b6e7623ba3b604e8030154773

Change-Id: Id52f3eb1cb4bcade3f0e42da0129b643fdc5b0f9
diff --git a/vendor/github.com/cevaris/ordered_map/key_pair.go b/vendor/github.com/cevaris/ordered_map/key_pair.go
new file mode 100644
index 0000000..88afbcf
--- /dev/null
+++ b/vendor/github.com/cevaris/ordered_map/key_pair.go
@@ -0,0 +1,16 @@
+package ordered_map
+
+import "fmt"
+
+type KVPair struct {
+	Key   interface{}
+	Value interface{}
+}
+
+func (k *KVPair) String() string {
+	return fmt.Sprintf("%v:%v", k.Key, k.Value)
+}
+
+func (kv1 *KVPair) Compare(kv2 *KVPair) bool {
+	return kv1.Key == kv2.Key && kv1.Value == kv2.Value
+}
\ No newline at end of file