test_thrusterStateDataAccess

Regression test for issue #1254.

The thrusterData member of ThrusterStateEffector is a std::vector<std::shared_ptr<THRSimConfig>>. The SWIG interface dropped the std::vector template instantiation for this type (commit f93eaa97b), so thrusterData came back to Python as an opaque SwigPyObject that could not be indexed or iterated. This test pins the member to behave as an iterable list of THRSimConfig objects.

test_thrusterStateDataAccess.test_thrusterData_is_iterable_list()

Test that thrusterData exposes THRSimConfig objects in Python.