add patterns for errors CLOTHES_SIZE_RANGE_BL, STORE_CODE_NOT_FOUND, VTA_NOT_FOUND and replace CLOTHES_SIZE_RANGE_OUT_OF_BOUND by CLOTHES_SIZE_RANGE_BL, add fixtures to tests these new values, order patterns
`parse_log_file()` use `parse_log_line()` to transform a log file into a list of LogEntry. Log patterns are no use for LogEntry model since the only use of LogEntry is in other modules. Thus, log patterns are now in `parser.py`. Logs are now separated based on test use cases.