Add column names to (default) CREATE statement

As per https://shibboleth.atlassian.net/browse/JJDBC-5 the the table has a mismatched number of columns the create fails, which is needless.

so we need to say something like

INSERT INTO StorageRecords ('context', 'id, 'expires', 'value', 'version' ) VALUES (?, ?, ?, ?, 1)