TrigConfigSvc: use LVL1ConfigSvc if only LVL1 information is required
TrigConfigSvc
is a wrapper around LVL1ConfigSvc
and HLTConfigSvc
.
For cases where only the LVL1 interface is required, may as well just
use that service directly.
This will make it easier to eventually remove TrigConfigSvc
.
cc @stelzer