Update application version to latest version from networkservicemesh/…

…cmd-nsc-vpp@master networkservicemesh/cmd-nsc-vpp#

networkservicemesh/cmd-nsc-vpp PR link: https://github.com/networkservicemesh/cmd-nsc-vpp/pull/

networkservicemesh/cmd-nsc-vpp commit message:
commit 990078faf9cf9ef3ce7301f23d02eb62d8fcb9f1
Author: Network Service Mesh Bot <60070799+nsmbot@users.noreply.github.com>
Date:   Sat Apr 17 15:08:58 2021 -0500

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

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

apps/nsc-memif/nsc.yaml

@@ -16,7 +16,7 @@ spec:
     spec:
       containers:
         - name: nsc
-          image: networkservicemeshci/cmd-nsc-vpp:3c4de708
+          image: networkservicemeshci/cmd-nsc-vpp:990078fa
           imagePullPolicy: IfNotPresent
           env:
             - name: NSM_REQUEST_TIMEOUT