Add labels to tests
The labels porousmediumflow and geomechanics are added to each test in the respective folders. In multidomain there are the labels boundary, darcydarcy, stokesdarcy, facet and embedded. Further each test has a label of the used model (e.g. 1p, 1pnc, navierstokes, ...).
Closes issue #595 (closed)
Edited by Theresa Schollenberger