Merge branch 'rt-remove-default-value-verbosity'

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>

lib/core/libimagrt/src/runtime.rs

@@ -179,7 +179,6 @@ impl<'a> Runtime<'a> {
                 .required(false)
                 .takes_value(true)
                 .possible_values(&["trace", "debug", "info", "warn", "error"])
-                .default_value("info")
                 .value_name("LOGLEVEL"))
 
             .arg(Arg::with_name(Runtime::arg_debugging_name())