Supports IPv6 address for scp and rsync

ONOS-7680

Change-Id: Ica7466715c64765310bfc7bf34126ed02d1818b7
diff --git a/tools/test/bin/proxy-stc b/tools/test/bin/proxy-stc
index b63c48b..bf31bc3 100755
--- a/tools/test/bin/proxy-stc
+++ b/tools/test/bin/proxy-stc
@@ -39,6 +39,6 @@
 status=$?
 
 mkdir -p /tmp/stc
-scp -r ${ONOS_USER}@${OCN}:/tmp/stc/* /tmp/stc/
+scp -r ${ONOS_USER}@[${OCN}]:/tmp/stc/* /tmp/stc/
 
-exit $status
\ No newline at end of file
+exit $status