Change tcar_getFilesList option parsing, from getopt to getopts.
    
    - Previously, tcar_getFilesList function was using getopt to parse
      options. However, the required implementation set at
      tcar_setModuleArguments function was removed in order to prevent
      unexpected commands from being passed through option values. In
      order to keep internal option parsing for tcar_getFilesList, but
      suppress the use of tcar_setModuleArguments, this update changes
      tcar_getFilesList interface to use getopts instead of getopt.