Automatically set the logging to debug level when updating cluster

[matthiasdeblock]

By default the logging for the framework components is set to 'info'. When you want to update the cluster, you need to manually change this to 'debug' if you want some logging when hitting the update button.

Setting the logging level to 'debug' is something the update process should need to configure. So, enable debug when starting the update process and disabling the debug level when finished.

[wimpers]

Better solution would be that the update logs the necessary as INFO so you don't have to fiddle with the log settings.

[JeffreyDevloo]

Fixed by #2251