existsConflict fix use assetAllocationConflicts not mapNextTx
existsConflict fix use assetAllocationConflicts not mapNextTx


Former-commit-id: aecb13b6b6f62c45dc2b3c19c7a6b19aec92d76a
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin