Make run_job merge job_config['config'] if needed
Merge pull request #93 from ceph/wip-runfix

Make run_job merge job_config['config'] if needed
Use teuthology-specific backup for /etc/sudoers
Merge pull request #94 from ceph/wip-fix-sudoers

Use teuthology-specific backup for /etc/sudoers
Revert "suite: do not calculate product on an empty list"

This reverts commit dda7954090ccc9ffd8ecd961d6b530a0e6d24964.

This commit was causing the number of jobs scheduled per suite to be
multiplied by anywhere from 2 to 7 or more.
Merge git://github.com/ceph/teuthology