Verify Greenmail using Sonar in CI build

[camann9]

+Get rid of Sonar violations

[buildscientist]

We can use SonarQube's Nemo instance for this. It looks like we'll need to ask for permission from the maintainers to add GreenMail to the project.

Based on this SonarQube Google Groups thread it appears that Sonar runs are pull based only. I'll see if we can have this run per build - otherwise it's counter to CI.

[buildscientist]

GreenMail is setup on Nemo SonarQube

Note the following regarding pull based Sonar builds:

Nemo analysis is set up to run daily. Eventually you should be able to trigger this at will, but for now it's daily.

Closing.