Fix typo in ceph config generation code
Fix typo in ceph config generation code

Change-Id: I349b3e42b725d37f14b1082e37f7c0f4b3eac615

open-power-ref-design-toolkit/os-services,open-power-ref-design-toolkit/os-services,open-power-ref-design/os-services,open-power-ref-design/os-services,open-power-ref-design-toolkit/os-services