Check existing temp files in system's temp folderSigned-off-by: austinfcui <austinfcui@gmail.com>Change-Id: Ic76c058cb18d5e723794a86c6695b73fbc409fa3
Add unit test for util's data-file.hpp/cpp filesSigned-off-by: austinfcui <austinfcui@gmail.com>Change-Id: I23a2786bc8ec8d5adc7be2b35e4db7fb950edadf