Create a new rbd_fio_test.yaml that demos how to create a response curve

[lee-j-sanders]

Create a new rbd_fio_test.yaml that demos how to create a response curve using the PR306 tooling that was added to CBT.

I had to delete the existing YML because it contained a small amount of sensitive data and create a new YAML. I did this in separate commits to reduce the risk of exposing the sensitive data.

I also used the opportunity to change the name to follow the same file extension as the other example YAMLs (.yaml instead of .yml).

I've tested these changes with the example response curve that I'll attach to the PR.

Users of this PR, will need to change the mysystem.mycompany.com to something more appropriate to their system.

[lee-j-sanders]

Example graph here:

[lee-j-sanders]

Mark please review my PR. Thanks!