Changed the domain from 'material' to 'mesh' in mgxs_library_condense and mgxs_library_hdf5.
This way, current can be tested for those functionalities.
The other tests were not relevant to current.
The test mgxs_library_mesh was already includes current.
These tests had to skip 'current' because current operates only with a mesh domain.
However, these tests impose a material domain. Therefore, they should not be run with current.