Removed obsolete tables and splitting fee gst in csgst and sgst
Merge pull request #167 from RedCarpetUp/customer_refund testcases for customer_refund and fee_refund, moved query in customer refund to migration script
Merge pull request #167 from RedCarpetUp/customer_refund testcases for customer_refund and fee_refund, moved query in customer refund to migration script