The issue described Hudson-2485 applies to the Maven2 builder as well. Unfortunately, the fix for that particular issue didn't fix the Maven2 builder. But a very similar fix would.
Please find attached a patch, based on the approach used in the
JENKINS-2485 issue, as well as a sample module and hudson config to reproduce the problem.
When running the config, you should see two maven executions, both of which will fail; after applying the patch the second one (done using the m2-extra-steps plugin, configured to only run for successful builds) will not execute.
This also addresses a comment on the m2-extra-steps plugin page, which mentions that the extra steps occur regardless of the build outcome.