Use teuthology.beanstalk

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Return corrected tube_name

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Use corrected tube_name

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>