Add missing parameter to example

swift-ring-builder needs an extra parameter

Change-Id: I6ee78e38c1cb19eeb963194912ef56d21fff6dd9
Closes-Bug: #1266265
Use openrc.sh instead of openrc

Use the same filename for all references to the credentials bash file.

Change-Id: I6bf1f9f318bf3f2a39c42fdbac2c400a31d4ce8a
backport: none
Merge "Add missing parameter to example"