Prevent ogrinfo table summary on lparole

The ogrinfo table summary (useful only for logging purposes) has been
observed at South Gippsland to take over 20 minutes (and similarly
reported at Glen Eira). By substituting 'cnacomp' in place of 'lparole'
as the source, we avoid running a table summary on lparole. The actual
table extract query is unaffected.