More DB indexes needed

[tbar0970]

Troubleshooting some slow queries I found some FKs that are needed:

alter table service_item add constraint `service_item_serviceid` foreign key (`serviceid`) references `service` (`id`);
alter table service_item add constraint `service_item_serviceid` foreign key (`serviceid`) references `service` (`id`);
alter table service_item add constraint `service_item_componentid` foreign key (`componentid`) references `service_component` (`id`);
alter table service_component add constraint `service_component_cat` foreign key (`categoryid`) references `service_component_category` (`id`);
alter table congregation_service_component add constraint `congregation_service_component_cong` foreign key (`congregationid`) references `congregation` (`id`);
alter table congregation_service_component add constraint `congregation_service_component_comp` foreign key (`componentid`) references `service_component` (`id`);

Need to add these to the installer (and test it still works) as well as to an upgrade script.