Update the OpenDaylight support to the Helium release

The OpenDaylight project recently released their latest release, codenamed
Helium. This commit updates the devstack support for OpenDaylight to this
new version, which includes changes to configuration files as well as the
startup of OpenDaylight itself.

Also update my email address in MAINTAINERS.rst.

Change-Id: I124b5e7e8ef7feb6c90de907916a9530409c4ad4
Merge "Update the OpenDaylight support to the Helium release"