Use a custom TestRunner

[gohierf]

This would enable more flexbility over the default unittest.TextTestRunner.
The runner should provide:

• a progress-bar visible in CLI
• write result on the go in a text (CSV, YML ?) file
• test duration

The custom runner would be a cleaner way to send tests status to GUI and execution control to processManager, could it deal with:

• retry
• timeout
• continue, pause, abort

If not doable in the runner could it be set in the TestCase ?
See SelectableTestCase