Update go.mod and go.sum to latest version from networkservicemesh/cm…

…d-forwarder-vpp@main

PR link: networkservicemesh/cmd-forwarder-vpp#443

Commit: 15d680f
Author: Network Service Mesh Bot
Date: 2021-12-15 19:18:44 -0600
Message:
  - Update go.mod and go.sum to latest version from networkservicemesh/sdk-vpp@main (#443)
PR link: networkservicemesh/sdk-vpp#475

Commit: 2e97609
Author: Network Service Mesh Bot
Date: 2021-12-14 12:08:17 -0600
Message:
    - Update go.mod and go.sum to latest version from networkservicemesh/sd…
Signed-off-by: NSMBot <nsmbot@networkservicmesh.io>

apps/forwarder-vpp/forwarder.yaml

@@ -18,7 +18,7 @@ spec:
       hostNetwork: true
       dnsPolicy: ClusterFirstWithHostNet
       containers:
-        - image: ghcr.io/networkservicemesh/ci/cmd-forwarder-vpp:4c9d7d8
+        - image: ghcr.io/networkservicemesh/ci/cmd-forwarder-vpp:15d680f
           imagePullPolicy: IfNotPresent
           name: forwarder-vpp
           securityContext:

examples/features/select-forwarder/forwarder.yaml

@@ -18,7 +18,7 @@ spec:
       hostNetwork: true
       dnsPolicy: ClusterFirstWithHostNet
       containers:
-        - image: ghcr.io/networkservicemesh/ci/cmd-forwarder-vpp:4c9d7d8
+        - image: ghcr.io/networkservicemesh/ci/cmd-forwarder-vpp:15d680f
           imagePullPolicy: IfNotPresent
           name: my-forwarder-vpp
           securityContext: