Rewrote the getComment logic, so the selfdiagnose.xml is the primary source, and the referred task is a fallback.
Previously, the referred task was the primary source. This resulted in the use of multiple locations for the values in the 'left column' of the selfdiagnose page.
Merge pull request #3 from opwvhk42/master

Rewrote CustomDiagnosticTask#getComment() to allow selfdiagnose.xml to override the task comment