Universe file organization

1. vk-1.class.junit.universe/vk.class.junit.universe: 
	- JUnit test cases.
	- vk-1.class.junit.universe: common test cases between vk-1 and vk.
	- vk.class.junit.universe: common test cases between vk and vk+1. 

2. vk.class.junit.universe.all
	- include all test cases for vk.
