velia package: Adapt to logging changes

Adapt to changes in [1].  Remove several log sinks. Set DEBUG level as default.

[1] https://gerrit.cesnet.cz/c/CzechLight/velia/+/2887

Change-Id: Ib146ea87c1f8faa03c3dc98af07cf997e3441334
diff --git a/package/velia/velia.service b/package/velia/velia.service
index c43724a..0cf56d3 100644
--- a/package/velia/velia.service
+++ b/package/velia/velia.service
@@ -6,7 +6,7 @@
 [Service]
 Type=simple
 ExecStartPre=/bin/sh -c 'echo 0 > /sys/class/leds/status:green/brightness'
-ExecStart=/usr/bin/veliad --input-log-level=5 --output-log-level=5 --manager-log-level=5
+ExecStart=/usr/bin/veliad --log-level=4
 PrivateTmp=yes
 PrivateDevices=no
 ProtectSystem=yes