Add more tests for models on OSB which *should* run with pylems #21
Description
Examples:
- https://github.com/OpenSourceBrain/MainenEtAl_PyramidalCell/tree/master/neuroConstruct/generatedNeuroML2
- https://github.com/OpenSourceBrain/GranuleCell/tree/master/neuroConstruct/generatedNeuroML2
- https://github.com/openworm/muscle_model/tree/master/NeuroML2
- https://github.com/OpenSourceBrain/L5bPyrCellHayEtAl2011/blob/master/neuroConstruct/generatedNeuroML2/LEMS_L5bPyrCellHayEtAl2011.xml