cpu_free was not set correctly due usage of two different keywords for the same: cpu_free and cpu_free_min.

forgot to remove all references to log file writing with print_both, give logger a file handler, not a path

when logging to do not print to stdout, press enter to continueif not logging to file, also add the cpu_free_min option to the argument parser

when the user does not have any jobs, the pbswrap.parse_qstat will not contain the current users uid. Fail gracously and set cpu_user count to zero instead