The progress reporter for a job should update the database if the progress is increased with >= 5%

[Nicklas Nordborg]

The current rule is that the progress is only updated if at least 5 seconds has passed since the last update. Some plug-ins (for example the Base1PluginExecuter) cannot do the update at regular intervals. It usually waits at 10% when the external plug-in code is executing. The problem is that the time taken to get to that point is usually less than 5 seconds and the progress that the user sees says: 0%, Exporing data...

So, I think if the progress is increased by at least 5% the database should always be updated. It should not cause any performance degradation, since at most 20 such updates can happen.

[Nicklas Nordborg]

(In [4123]) Fixes #917: The progress reporter for a job should update the database if the progress is increased with >= 5%