[FIX] hanging payment tests
[FIX] hanging payment tests

hash needs to be unique for non-validated payment posts

Treefunder/ripple-rest,sparro/ripple-rest,radr/radr-rest,lumberj/ripple-rest,xdv/ripple-rest,ripple/ripple-rest,bankonme/ripple-rest,sparro/ripple-rest,hserang/ripple-rest,dinexcode/ripple-rest-dinex