Update application version to latest version from networkservicemesh/…

…cmd-nse-icmp-responder@master networkservicemesh/cmd-nse-icmp-responder#128

networkservicemesh/cmd-nse-icmp-responder PR link: networkservicemesh/cmd-nse-icmp-responder#128

networkservicemesh/cmd-nse-icmp-responder commit message:
commit 7a7159d58f91d41385b331dda03613d899c45551
Author: Network Service Mesh Bot <60070799+nsmbot@users.noreply.github.com>
Date:   Fri Apr 2 19:15:24 2021 -0500

    Merge 6f3b95be8eae8834db06648761e58f3ff1d8d35e into e770cc1161230848131187849bc82f556cc68b5e

Signed-off-by: NSMBot <nsmbot@networkservicmesh.io>

apps/nse-kernel/nse.yaml

@@ -16,7 +16,7 @@ spec:
     spec:
       containers:
         - name: nse
-          image: networkservicemeshci/cmd-nse-icmp-responder:16cfbb82
+          image: networkservicemeshci/cmd-nse-icmp-responder:7a7159d5
           imagePullPolicy: IfNotPresent
           env:
             - name: SPIFFE_ENDPOINT_SOCKET