Use qt_add_executable for unit tests

Author: magnesj

ApplicationLibCode/UnitTests/CMakeLists.txt

@@ -156,7 +156,7 @@ endforeach()
 add_custom_target(PreBuildFileCopyTest ${copyCommands})
 set_property(TARGET PreBuildFileCopyTest PROPERTY FOLDER "FileCopyTargetsTest")
 
-add_executable(ResInsight-tests ${SOURCE_UNITTEST_FILES} main.cpp)
+qt_add_executable(ResInsight-tests ${SOURCE_UNITTEST_FILES} main.cpp)
 
 # Make ResInsight-tests depend on the prebuild target.
 add_dependencies(ResInsight-tests PreBuildFileCopyTest)