To provide more "burn in" time for the new Jepsen task, run it more frequently on a new build variant, ubuntu1404_jepsen. The variant should run as frequently as the Enterprise RHEL 6.2 variant.

Also, since the Jepsen analysis phase has exhibited lengthy runs (> 2 hours), we want to run 3 distinct tasks:

• --time-limit 150 (default)
• --time-limit 300 (current setting)
• --time-limit 600 (desired setting)