VOL-4125: Respond with success/failure to flow insertion according the
          operation result in adapter
VOL-4323: Support serialization of flow messages (execute a flow to
          completion before picking up another flow)

Change-Id: I934fc68b103042971109923491a3f27aaf885328
diff --git a/internal/pkg/common/defines.go b/internal/pkg/common/defines.go
index 2c597c1..23a16dd 100755
--- a/internal/pkg/common/defines.go
+++ b/internal/pkg/common/defines.go
@@ -314,6 +314,7 @@
 	CookieSlice    []uint64               `json:"cookie_slice"`
 	VlanRuleParams UniVlanRuleParams      `json:"vlan_rule_params"`
 	Meter          *voltha.OfpMeterConfig `json:"flow_meter"`
+	RespChan       *chan error            `json:"-"`
 }
 
 ///////////////////////////////////////////////////////////