This simplifies the PlugwiseHandlerFactory code so it no longer needs to register and keep track of a discovery service for each bridge.
Also contains a few other improvements:
* fix lastRequest timestamp not updated when sending messages to discover node properties
* use java.time Duration and Instant
* use List.of, Set.of
* remove redundant null suppression because of EEAs
Signed-off-by: Wouter Born <github@maindrain.net>
These workarounds to prevent false positives can be removed now the EEAs allow for proper null analysis.
Signed-off-by: Wouter Born <github@maindrain.net>
