[test] Disable regression test for 2p2c adaptive sequential

With our current test tool it is very hard to create regression tests
for adaptive grids. The adaption criterion is usually based on a
threshold, so it might be slightly different on different architectures.
This will currently make the test fail, altough physically the solution
might not be very different. For such cases tests are very complicated.
One possibility might be the projection on a known grid on which the
regression error can be computed.

Until such tools are avaiable, we simply compile and run the test but
do not check for regression in the solution.

test/porousmediumflow/2p2c/sequential/CMakeLists.txt

@@ -2,21 +2,11 @@ add_input_file_links()
 
 dune_add_test(NAME test_adaptive2p2c2d
               LABELS porousmediumflow 2p2c
-              SOURCES test_adaptive2p2c2d.cc
-              COMMAND ${CMAKE_SOURCE_DIR}/bin/testing/runtest.py
-              CMD_ARGS --script fuzzy
-                       --files ${CMAKE_SOURCE_DIR}/test/references/test_adaptive2p2c2d-reference.vtu
-                               ${CMAKE_CURRENT_BINARY_DIR}/test_adaptive2p2c2d-00007.vtu
-                       --command "${CMAKE_CURRENT_BINARY_DIR}/test_adaptive2p2c2d")
+              SOURCES test_adaptive2p2c2d.cc)
 
 dune_add_test(NAME test_adaptive2p2c3d
               LABELS porousmediumflow 2p2c
-              SOURCES test_adaptive2p2c3d.cc
-              COMMAND ${CMAKE_SOURCE_DIR}/bin/testing/runtest.py
-              CMD_ARGS --script fuzzy
-                       --files ${CMAKE_SOURCE_DIR}/test/references/test_adaptive2p2c3d-reference.vtu
-                               ${CMAKE_CURRENT_BINARY_DIR}/test_adaptive2p2c3d-00011.vtu
-                       --command "${CMAKE_CURRENT_BINARY_DIR}/test_adaptive2p2c3d")
+              SOURCES test_adaptive2p2c3d.cc)
 
 dune_add_test(NAME test_dec2p2c
               LABELS porousmediumflow 2p2c