updated test cases and name conventions in Test Data

ProcessLib/HeatTransportBHE/Tests.cmake

.../Parabolic/T/3D_3BHEs_array_python_interface/3bhes_1U.gml

.../Parabolic/T/3D_3BHEs_array_python_interface/3bhes_1U.prj

.../Parabolic/T/3D_3BHEs_array_python_interface/3bhes_1U.vtu

...Es_array_python_interface/3bhes_1U_ts_10_t_600.000000.vtu

...ata/Parabolic/T/3D_3BHEs_array_python_interface/README.md

...ray_python_interface/bcs_tespy_and_serverCommunication.py

.../Parabolic/T/3D_3BHEs_array_python_interface/pre/3bhes.py

...T/3D_3BHEs_array_python_interface/pre/3bhes_closedloop.py

...lic/T/3D_3BHEs_array_python_interface/pre/bhe_network.csv

...Es_array_python_interface/pre/tespy_nw/components/bus.csv

...ay_python_interface/pre/tespy_nw/components/char_line.csv

...terface/pre/tespy_nw/components/heat_exchanger_simple.csv

..._array_python_interface/pre/tespy_nw/components/merge.csv

...s_array_python_interface/pre/tespy_nw/components/pump.csv

...s_array_python_interface/pre/tespy_nw/components/sink.csv

...array_python_interface/pre/tespy_nw/components/source.csv

...ray_python_interface/pre/tespy_nw/components/splitter.csv

...3BHEs_array_python_interface/pre/tespy_nw/connections.csv

...3D_3BHEs_array_python_interface/pre/tespy_nw/network.json