Test suite should run over the specialized case

[robertdale]

The test suite currently executes for the standard TinkerGraph. This is good for any regressions against the non-specialized case.

For the specialized case, the only test is SpecializedElementsTest which isn't very comprehensive.

The test suite should run over the specialized case. This would mean modelling some or all of the various schemas in the test suite e.g. modern, crew, etc.