upgrading junit
(in order to using named parameterized tests, thanks http://fahdshariff.blogspot.cz/2013/03/junit-naming-individual-test-cases-in.html )
+ AbstractTypeGraphTest
(preparing to migration to parameterized tests and separation of loading and testing graph)
TypeDependencyGraphTest: pushing under AbstractTypeGraphTest
+ TypeGraphLoadTest, parameterized
- testing invalid graphs (covered by TGLT)