fix balance transfer issue
fix balance transfer issue

The test can be occasionally fail because the balance of defproducera was determined by the number of  successful balance transfers in 398-426. The balance of defproducera could be accumulated up to 0.0106 CUR before considered error in line 429. Therefore, the way to make sure the transfer in line 513 to fail is to make the balance transfer amount in line 513 greater than 0.0106 CUR.

EOSIO/eos,EOSIO/eos,EOSIO/eos,EOSIO/eos,EOSIO/eos