[homematic] Fix for two (re)connection problems (#9692)

[homematic] Fix for two (re)connection problems (#9692)

* Replace deprecated constructors
* Removed no longer existing settings from the documentation. They were already marked as deprecated since several versions.
* Refactored communication with the HM gateway
- simplified coding for the communication with the gateway
- buffer size for communication is now configurable to avoid problems
with too small buffers
- Previous solution for #6963 was not sufficient. Should be finally done
with these changes
* Retrieving the duty cycle is sufficient to check connection
- ping requests could therefore be safely removed problems with the automatic reconnection were solved.
* Changed to explicit list of Exception

Fixes #8808

Signed-off-by: Martin Herbst <develop@mherbst.de>