Supports IPv6 address for scp and rsync

ONOS-7680

Change-Id: Ica7466715c64765310bfc7bf34126ed02d1818b7
diff --git a/tools/test/bin/onos-fetch-db b/tools/test/bin/onos-fetch-db
index b25adbf..6bf0ad5 100755
--- a/tools/test/bin/onos-fetch-db
+++ b/tools/test/bin/onos-fetch-db
@@ -39,6 +39,6 @@
 for node in $nodes; do
     echo "fetching from ${node}..."
     mkdir -p ${node}
-    scp -p -r $ONOS_USER@${node}:$ONOS_INSTALL_DIR/karaf/data/partitions/* ./${node}/
+    scp -p -r $ONOS_USER@[${node}]:$ONOS_INSTALL_DIR/karaf/data/partitions/* ./${node}/
 done