Name mistake in test function

[Ivar Stefansson]

porepy/tests/models/test_thermoporomechanics.py

Line 341 in e4d484f

 def test_poromechanics(): 

Function should be called something like test_thermoporomechanics_well

[Eirik Keilegavlen]

I will take care of this in connection with #1104