Incosistency in naming of location/path attribute of credential-store and secret-key-credential-store

In the Elytron subsystem, the secret-key-credential-store resource has the path attribute which is inconsistent with the credential-store resource with the location attribute.

The rest of the subsystem we have tried to stick to path and relative-to as a common pair. Maybe we could deprecate location on credential-store and add path there.