only use one level of directories for log files
only use one level of directories for log files

- Not sure how this ever worked properly, it should only be creating a
single level (AKA the log file itself).

Signed-off-by: Stu Pollock <f92a33a5576f99e8c458f20aa3ed76c650ba4a5c@pivotal.io>

cloudfoundry/cli,cloudfoundry/cli,cloudfoundry/cli