Merge branch 'feature/run-more-tests-in-parallel' into 'master'

run more tests in parallel

See merge request !411

(cherry picked from commit 16c1e199)

05dd1005 run more tests in parallel

dune/common/parallel/test/CMakeLists.txt

@@ -3,6 +3,8 @@ dune_add_test(SOURCES indexsettest.cc
 
 dune_add_test(SOURCES remoteindicestest.cc
               LINK_LIBRARIES dunecommon
+              MPI_RANKS 1 2 4
+              TIMEOUT 300
               CMAKE_GUARD MPI_FOUND)
 
 dune_add_test(SOURCES selectiontest.cc
@@ -10,7 +12,11 @@ dune_add_test(SOURCES selectiontest.cc
 
 dune_add_test(SOURCES syncertest.cc
               LINK_LIBRARIES dunecommon
+              MPI_RANKS 1 2 4
+              TIMEOUT 300
               CMAKE_GUARD MPI_FOUND)
 
 dune_add_test(SOURCES variablesizecommunicatortest.cc
+              MPI_RANKS 1 2 4
+              TIMEOUT 300
               CMAKE_GUARD MPI_FOUND)