func (idx *IndexMap) Rename(indname string) *IndexMap {
	idx.IndexName = indname
	return idx
}
Rename allows you to specify the index name in the table

Example:  table.IndMap("customer_test_idx").Rename("customer_idx")
package gorp
type IndexMap struct {
	IndexName string
	Unique bool
	IndexType string
	columns []string
}