fix vCvhdr::summary_by_supplier for /report/cvhdr-supplier

- add percentage calculation
fix /report/cvhdr-supplier a module for showing check deatils of a CV

- fix listing of CV by querying supplier to supply the vCvhdr::summary_by_supplier()
- add vCvhdr::sum_group_by_supplier() to compute the all/posted/unposted amount
- add vCvchkdtl::status_with_supplier() a sub query for self::summary_by_supplier too show all the cvchkdtl of a supplier
- add bank info on listing of check details(cvchkdtl)