Supports IPv6 address for scp and rsync

ONOS-7680

Change-Id: Ica7466715c64765310bfc7bf34126ed02d1818b7
diff --git a/tools/test/bin/onos-push-bits-through-proxy b/tools/test/bin/onos-push-bits-through-proxy
index 5ba72b7..b983af2 100755
--- a/tools/test/bin/onos-push-bits-through-proxy
+++ b/tools/test/bin/onos-push-bits-through-proxy
@@ -21,6 +21,6 @@
     echo \"Pushing to \$other ...\";
     scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
         /tmp/\$(basename $ONOS_TAR) \
-        $ONOS_USER@\$other:/tmp/\$(basename $ONOS_TAR)
+        $ONOS_USER@[\$other]:/tmp/\$(basename $ONOS_TAR)
   done
 "