Add methods for querying and deleting jobs

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
When killing a run, delete paddles jobs

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Use shared methods to connect to beanstalkd

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Rename teuthology.queue to teuthology.worker

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Submit queued jobs to paddles

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
When deleting jobs, also delete them from paddles

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Look for archive_base in config

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Be slightly less verbose about logging

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Refactor try_delete_jobs()

Also tweak its error message