After additional testing it has been proven that the GitHub plugin
itself, which is used for the final merge (push) operation will only
register as a handler if the SCM URL is fully realized without any
variables.
Issue: RELENG-191
Change-Id: I3492dac96e85a3d81819fd2ba810629f179d0c04 Signed-off-by: Andrew Grimberg <agrimberg@linuxfoundation.org>