update datacache

receiver/src/data_cache.cpp

receiver/src/data_cache.h

receiver/src/request.cpp

receiver/src/request.h

receiver/src/request_handler_db_write.cpp

receiver/unittests/receiver_mocking.h

receiver/unittests/test_datacache.cpp

receiver/unittests/test_request.cpp

tests/automatic/full_chain/two_beamlines/check_linux.sh