Add unit tests for ParallelChecker

src/dev/ParallelChecker.hpp

src/mesh/ItemOfItemType.hpp

src/utils/BuildInfo.cpp

tests/CMakeLists.txt

tests/ParallelCheckerTester.cpp

tests/ParallelCheckerTester.hpp

tests/test_ParallelChecker_read.cpp

tests/test_ParallelChecker_write.cpp