Automatic credential store update not triggered when updating a credential-reference for an existing datasource

Currently, an automatic credential store update is only triggered when adding a new datasource with a credential-reference. However, the update isn't triggered when updating an existing datasource using the write-attribute operation due to a bug in DataSourceDefinition#registerAttributes. We just need to update the check there to use CREDENITAL_REFERENCE.getName() and RECOVERY_CREDENTIAL_REFERENCE.getName() instead of just CREDENITIAL_REFERENCE and RECOVERY_CREDENTIAL_REFERENCE, respectively.