Change default log level to INFO from DEBUG

This will not affect `ci-runtests.sh` as the log level is set to `DEBUG` using the `RUST_LOG` env variable anyway.

test/test-manager/src/logging.rs

@@ -30,7 +30,7 @@ impl Logger {
             logger.filter_module("tower", log::LevelFilter::Info);
             logger.filter_module("hyper", log::LevelFilter::Info);
             logger.filter_module("rustls", log::LevelFilter::Info);
-            logger.filter_level(log::LevelFilter::Debug);
+            logger.filter_level(log::LevelFilter::Info);
             logger.parse_env(env_logger::DEFAULT_FILTER_ENV);
 
             let env_logger = logger.build();