TinkerStorageTest: got rid of delete dir errors by closing the Reader in GMLReader.inputGraph
blueprints-test: Made a few graph writer test OS agnostic.
blueprints-test: made EdgeTestSuite tests pass by closing a graph
blueprints-neo4j-graph: made Neo4jGraphTest tests pass by closing a graphs
Merge pull request #481 from juharris/TinkerStorageTest-passes

Making more tests pass - typically a windows related issue