private ClassLoding getClassLoding(OnClassLoader onClassLoader) {
        if (onClassLoader == null) {
            return ClassLoding.Child;
        } else {
            return onClassLoader.type();
        }
    }
We have referred OrderedThreadPoolExecutor ParentRunner of JUnit.

@author Jongho Moon
@author Taejin Koo
agent-module/plugins-test-module/plugins-test/src/main/java/com/navercorp/pinpoint/test/plugin/DefaultPluginForkedTestSuite.java