Merge branch 'bugfix/cmake-test-macro' into 'master'

[bugfix] Make test require executable

The test falsely required an executable with the name of the test
instead of the name of the executable. As the comment correctly states
the test needs the executable to run not a test target..

See merge request !45

cmake/modules/DumuxTestMacros.cmake

@@ -57,6 +57,6 @@ macro(add_dumux_test dumux_test dumux_test_executable dumux_test_executable_sour
                   COMMAND ${dumux_test_args}
                   SKIP_ON_77)
     # tests always require the executable to run
-    set_tests_properties(${dumux_test} PROPERTIES REQUIRED_FILES ${dumux_test})
+    set_tests_properties(${dumux_test} PROPERTIES REQUIRED_FILES ${dumux_test_executable})
   endif()
 endmacro()