Update maven version to the latest in sid
Add missing junit dependency to get tests to run with maven
Bootstrap debian build from itself rather than maven-ant-helper
Allow optional extension jars in maven home

This follows the default conf file distributed with Maven
Update mojos to use annotations

This also fixes a warning when building while using the @parameter expression="${property}"
syntax
Remove no-docs option

This appears to have been needed to disable executions when dealing with
pom-typed projects. Since the default executions for these projects in
Maven 3 also removed executions that we disabled in Maven 2, this option
is no longer needed.