Fix for bug 389: https://bugs.opendaylight.org/show_bug.cgi?id=389

Open DCS reads the version as "change_version" instead of
"update_version"

Change-Id: I1d66541749bb12496e9e3ffa9fb470c5fc39dfa7
Signed-off-by: Amitabha Biswas <abiswas@us.ibm.com>