[VOL-3210] Added Retry feature in BBSim for EAPOL and DHCP

Change-Id: If0586c804f906998ebc09b7770fd6a749a3a2762
diff --git a/go.mod b/go.mod
index 7784d8c..2fd2603 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,6 @@
 	github.com/aead/cmac v0.0.0-20160719120800-7af84192f0b1 // indirect
 	github.com/cboling/omci v0.1.0
 	github.com/deckarep/golang-set v1.7.1 // indirect
-	github.com/fatih/structs v1.1.0
 	github.com/ghodss/yaml v1.0.0
 	github.com/golang/protobuf v1.3.2
 	github.com/google/gopacket v1.1.17
@@ -15,6 +14,7 @@
 	github.com/grpc-ecosystem/grpc-gateway v1.12.2
 	github.com/jessevdk/go-flags v1.4.0
 	github.com/jhump/protoreflect v1.5.0
+	github.com/jpillora/backoff v1.0.0
 	github.com/looplab/fsm v0.1.0
 	github.com/olekukonko/tablewriter v0.0.4
 	github.com/opencord/cordctl v0.0.0-20190909161711-01e9c1f04bf4
@@ -22,7 +22,6 @@
 	github.com/opencord/voltha-protos/v2 v2.1.2
 	github.com/pkg/errors v0.8.1 // indirect
 	github.com/sirupsen/logrus v1.4.2
-	golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135
 	google.golang.org/genproto v0.0.0-20190927181202-20e1ac93f88c
 	google.golang.org/grpc v1.27.0
 	gopkg.in/yaml.v2 v2.2.8