Eliminate the warning that complains about non-existent driver mappings

While starting Tomcat i get a warning:

2005-03-29 15:01:27,030 WARN [atlassian.jira.upgrade.ConsistencyCheckImpl] File entityengine.xml is configured to use 'oracle' but there is no known mapping to database 'Oracle' or 'Oracle JDBC driver'

But jira use the "entitydefs/fieldtype-oracle.xml" file.