[FMI] Redirect COE output / Hide COE output from the AF3 console
Since #3853 (closed) the COE imported as a libary and executed as `Runnable`
within an Eclipse job.
As there is no way of redirecting the standard output and error streams of `Runnable`s (in contrast to `Process`es), the output of the COE server such as start-up an error messages are currently written to the AF3 console, cluttering it.
Unfortunately, using a `Process` to execute the server requires some command to be executed on the OS-level, meaning that the COE would have to be started by running `java -jar coe.jar`, thus reverting the changes from #3853 (closed).
(from redmine: issue id 4001, created on 2020-04-15)
- relates #3853 (closed)