Test ODM on ROKS

[lionelmace]

• [x] Improve Pre-Requisites with Cluster version, size, nodes flavours.... or at least Reference the Detailed System Requirements

• [x] Add a section to configure external DB

• [x] Explain how to retrieve the ICD DB Credentials

• [x] oc create route reencrypt my-sticky-dc-route --service=odm23-on-roks-odm-decisioncenter --cert=tls.crt --key=tls.key --dest-ca-cert=tls.crt

[lgrateau]

Thanks for the input. Doc has been updated