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/go.mod b/go.mod
index 1f26275..2d14c99 100644
--- a/go.mod
+++ b/go.mod
@@ -8,11 +8,12 @@
 	github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878 // indirect
 	github.com/boljen/go-bitmap v0.0.0-20151001105940-23cd2fb0ce7d
 	github.com/bsm/sarama-cluster v2.1.15+incompatible
+	github.com/cevaris/ordered_map v0.0.0-20190319150403-3adeae072e73
 	github.com/coreos/go-systemd v0.0.0-20190620071333-e64a0ec8b42a // indirect
 	github.com/coreos/pkg v0.0.0-20180108230652-97fdf19511ea // indirect
 	github.com/eapache/go-resiliency v1.2.0 // indirect
 	github.com/frankban/quicktest v1.5.0 // indirect
-	github.com/gogo/protobuf v1.3.0 // indirect
+	github.com/gogo/protobuf v1.3.0
 	github.com/golang/protobuf v1.3.2
 	github.com/google/uuid v1.1.1
 	github.com/hashicorp/consul/api v1.2.0