Merge pull request #1596 from Kenneth-T-Moore/bench

Fixed point iterator improvements, + some linting
updating the ringtail image, again.
Merge pull request #1597 from kmarsteller/dev

updating the ringtail image, again.
Merge pull request #1598 from Kenneth-T-Moore/bench

Fix for test
Fixing pangolin instance that was leaving its EBS volumes around after termination.
Merge pull request #1599 from kmarsteller/dev

Fixing pangolin instance that was leaving its EBS volumes around after t...
some fixes to fixed point iterator's check_config