go/payment: add new util for testing
go/payment: add new util for testing

jack89129/koding,usirin/koding,gokmen/koding,kwagdy/koding-1,cihangir/koding,usirin/koding,koding/koding,jack89129/koding,acbodine/koding,kwagdy/koding-1,szkl/koding,alex-ionochkin/koding,kwagdy/koding-1,cihangir/koding,usirin/koding,koding/koding,acbodine/koding,drewsetski/koding,acbodine/koding,kwagdy/koding-1,sinan/koding,andrewjcasal/koding,usirin/koding,alex-ionochkin/koding,drewsetski/koding,gokmen/koding,alex-ionochkin/koding,jack89129/koding,sinan/koding,drewsetski/koding,rjeczalik/koding,drewsetski/koding,mertaytore/koding,rjeczalik/koding,andrewjcasal/koding,alex-ionochkin/koding,sinan/koding,gokmen/koding,jack89129/koding,szkl/koding,cihangir/koding,andrewjcasal/koding,andrewjcasal/koding,szkl/koding,koding/koding,mertaytore/koding,andrewjcasal/koding,sinan/koding,koding/koding,mertaytore/koding,sinan/koding,acbodine/koding,gokmen/koding,rjeczalik/koding,alex-ionochkin/koding,jack89129/koding,acbodine/koding,acbodine/koding,rjeczalik/koding,cihangir/koding,gokmen/koding,mertaytore/koding,andrewjcasal/koding,kwagdy/koding-1,kwagdy/koding-1,cihangir/koding,sinan/koding,drewsetski/koding,koding/koding,szkl/koding,sinan/koding,drewsetski/koding,mertaytore/koding,rjeczalik/koding,usirin/koding,szkl/koding,rjeczalik/koding,alex-ionochkin/koding,usirin/koding,acbodine/koding,kwagdy/koding-1,sinan/koding,jack89129/koding,alex-ionochkin/koding,andrewjcasal/koding,alex-ionochkin/koding,drewsetski/koding,cihangir/koding,mertaytore/koding,cihangir/koding,gokmen/koding,koding/koding,mertaytore/koding,gokmen/koding,szkl/koding,jack89129/koding,mertaytore/koding,kwagdy/koding-1,koding/koding,cihangir/koding,andrewjcasal/koding,rjeczalik/koding,drewsetski/koding,jack89129/koding,gokmen/koding,acbodine/koding,koding/koding,usirin/koding,szkl/koding,rjeczalik/koding,usirin/koding,szkl/koding