private void overrideConfigBySystemEnv(ApplicationConfiguration configuration) {
        for (Map.Entry<Object, Object> prop : System.getProperties().entrySet()) {
            overrideModuleSettings(configuration, prop.getKey().toString(), prop.getValue().toString());
        }
    }
Initialize collector settings with following sources. Use application.yml as primary setting, and fix missing setting
by default settings in application-default.yml.
<p>
At last, override setting by system.properties and system.envs if the key matches moduleName.provideName.settingKey.
oap-server/server-starter/src/main/java/org/apache/skywalking/oap/server/starter/config/ApplicationConfigLoader.java