Increase consistency between job index and show.

Add tests for new date range and history filtering as well as to ensure only admins get to see external_id and command_line and that users cannot see each other's jobs.

Always allow admins to views all jobs on index (instead of only when user_details is specified) and show. Add user_email and external_id to show (for admins) to bring it inline with index and add command_line to index (for admins) to bring it in line with show.

Show still allow more details including job standard error and output as well as job metrics.