Add Junit to maven.
Add TestGraph.
Edit travis setting.
add some JDK
Update Jdk
Remove OpenJdk
Add install graphviz script.
Add CI image.
Add TestGraphviz class.
Merge branch 'master' into develop
Add Sample Test .
update test case
Fix tme disable Test case.
Remove unuse import.
Add OS create file to gitignore.
Add Exceptions.
Add TestException.
Imp AttributeException.
Edit TestExcepiton.
Fix TestException.