Improve log retrieval logging

[dpmatthews]

Problem

If you set retrieve job logs max size there is no evidence if any files get skipped

Proposed Solution

1. Record the output from the log transfer in job-activity.log (currently you only see it in the scheduler log if you use debug mode).
2. Replace the rsync option -v with --info=skip --out-format="%o %n%L". Example output:

1/hello/01/job.large is over max-size
recv 1/hello/01/
recv 1/hello/01/job.err
recv 1/hello/01/job.out
recv 1/hello/01/job.status
recv 1/hello/01/job.xtrace