* Avoid warning about swap being unlimited
Currently we get the following message on Jenkins:
"Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap."
Since we're not limiting swap anyway, we might as well avoid trying to.
https://docs.docker.com/config/containers/resource_constraints/#--memory-swap-details
* Fix escaping in re.search()
* Fix escaping in _noisy_layer()
* Raise a more descriptive error when dashboard data isn't found
* Don't error on dashboard files not being found when webui isn't required
* Change dashboard error to a warning instead
Stress testing for Jenkins.
<!--
Thank you for your contribution!
Please review https://github.com/ray-project/ray/blob/master/CONTRIBUTING.rst before opening a pull request.
-->
<!-- Please give a short brief about these changes. -->
TODO:
- [x] Enable a common keypair for autoscaling
- [x] Add automatic timeouts?
- [x] Switch out key pair one last time before merge
