fix sqlite function calls for sqlalchemy 0.7
fix sqlite function calls for sqlalchemy 0.7

tomkralidis/pycsw,kevinpdavies/pycsw,ocefpaf/pycsw,ocefpaf/pycsw,tomkralidis/pycsw,ckan-fcd/pycsw-fcd,geopython/pycsw,benhowell/pycsw,geopython/pycsw,rouault/pycsw,tomkralidis/pycsw,kevinpdavies/pycsw,geopython/pycsw,mwengren/pycsw,kalxas/pycsw,mwengren/pycsw,bukun/pycsw,bukun/pycsw,ingenieroariel/pycsw,kalxas/pycsw,ricardogsilva/pycsw,ckan-fcd/pycsw-fcd,PublicaMundi/pycsw,ricardogsilva/pycsw,ricardogsilva/pycsw,ingenieroariel/pycsw,PublicaMundi/pycsw,benhowell/pycsw,bukun/pycsw,kalxas/pycsw,rouault/pycsw