Pass argument '--quiet' to LMS by default

[robho]

Systemd processes log messages on LMS stdout, but since LMS has its own logging system we don't need systemd to handle logs.

This helps avoid duplicated logs in case LMS is started through systemd.

This is an alternative to #41.

[mw9]

I’ve been using this approach for some months now to prevent LMS logging to STDOUT in addition to its regular log file. It works well, with no apparent drawbacks.

I support this change.

[mherger]

Thanks guys!