High level API fixes December 23 (#582)
* Only try to connect to controller node when commissioned
fixes #579 pt 1
* Ignore node start errors when starting multiple nodes
fixes #579 pt 2
On first error the initialization of the other nodes was not tried.
* Call commissioningChanged callback on factoryReset
* Clear really all contexts on factory reset
* Changelog
* Only bulk-ignore start errors on bulk starts
* Introduce Decommissioned state info on PairedNode
* Adjust tests
* Add unique check for storage keys and log name on node-start-error
