fixup! Use consistent --cert and --key values for Securing the Registry
fixup! Use consistent --cert and --key values for Securing the Registry

Rework the per-node ca.crt installation example to:
- be more readable (via use of shell variables)
- emphasize that ca.crt is the one copied from master

xiaoping378/openshift-docs,xiaoping378/openshift-docs,xiaoping378/openshift-docs