Run oidc-keys-add role only if cas >= 6.5

[vjrj]

If you try to install a previous version, you get a:

...Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: No enum constant org.apereo.cas.services.RegisteredServiceMultifactorPolicy.FailureModes.UNDEFINED>

that you can workaround via:

# grep cas-service /data/cas/config/application.yml # Search for your password
# mongo -u services cas-service-registry # type the  password here
> db.services.remove({"description":  { "$regex": ".*OIDC Service.*"}});
Ctrl-D
# service cas restart

More info: https://atlaslivingaustralia.slack.com/archives/CCTFGEU1G/p1703761335361729