Merge pull request #2896 from nagelt/Lubby2MFront

MaterialLib/SolidModels/MFront/CMakeLists.txt

MaterialLib/SolidModels/MFront/Lubby2.mfront

MaterialLib/SolidModels/MFront/Lubby2.py

MaterialLib/SolidModels/MFront/Lubby2mod.mfront

ProcessLib/SmallDeformation/Tests.cmake

Tests/Data/Mechanics/Burgers/cube_1e0_mfront.prj

Tests/Data/Mechanics/Burgers/cube_1e0_mfront_mod.prj

...s/Burgers/cube_1e0_mfront_mod_pcs_0_ts_101_t_1.000000.vtu

...ics/Burgers/cube_1e0_mfront_mod_pcs_0_ts_1_t_0.000100.vtu

...anics/Burgers/cube_1e0_mfront_pcs_0_ts_101_t_1.000000.vtu

...chanics/Burgers/cube_1e0_mfront_pcs_0_ts_1_t_0.000100.vtu