Update data2passcal.py - replace logger.error by logger.exception, add exception for socket.gethostname(), and rename test.dat; Update test_data2passcal.py - use data2passcal timeout constants, and set MOCK_TEST as an environment variable

Specify timeouts for unit tests; Clean up imports and try/excepts in data2passcal.py; Recreate test.dat under ftp://ftp.passcal.nmt.edu/download/public/