refactored tests and added a new test
refactored tests and added a new test

- deleting a node as been moved to the absolutely last test because you can't delete a node that has a relationship, thus all of those have to finish and I'm new functionality that is dependent on that node
- add test for updating a relationship with properties

aroyer/neo4j-ios-patch,niklassaers/neo4j-ios,aroyer/neo4j-ios-patch,GraphStory/neo4j-ios,GraphStory/neo4j-ios,niklassaers/neo4j-ios