In my environment this bug is related to the listed Maven Findbugs Plugin. This plugin has already been released.
The class FindbugsMavenPluginHandler would have to be ammended in two lines.
1) getVersion has to return "2.0"
2) The direct dependency to findbugs, added in configurePlugin has to be removed. If this dependency is in place, I got errors from findbugs about missing environment setting FINDBUGS_HOME. In my opinion this dependency should be removed in any case, as the findbugs plugin should name the dependency.
I would be great to include this fix for release 1.8, as this bug prevents the usage of sonar on some of our projects in our live environment.