Automatically activate service after discovery using plugin

@LaSoe Thank you for the hint. I tried the Rest Api and it seems to work in general. E.g. getting services works but changing the phase doesn´t. The python script I tested yielded ‘Done’, so I don´t believe the script is wrong, but neither ‘monitored’ nor ‘ignored’/‘vansihed’ seem to work. If it is a bug, then I have to wait for the next version.