Missing get_loc_OEH_kpts() method in pDMET class

[qstaelens]

While running the test_cost_function in test_gradient.py, an AttributeError is raised because the pDMET class does not define a get_loc_OEH_kpts() method. The error occurs at line 89 in test_gradient.py:

AttributeError: 'pDMET' object has no attribute 'get_loc_OEH_kpts'