operation_tests2.cpp:  Fix production check in witness_create
operation_tests2.cpp:  Fix production check in witness_create

pmconrad/graphene,peertracksinc/muse,peertracksinc/muse,oxarbitrage/bitshares-core,bitsuperlab/cpp-play2,bigoc/openchain,bitshares/bitshares-2,oxarbitrage/bitshares-core,bitsuperlab/cpp-play2,pmconrad/graphene,peertracksinc/muse,oxarbitrage/bitshares-core,bitshares/bitshares-2,bitshares/bitshares-2,bigoc/openchain,abitmore/bitshares-2,cryptonomex/graphene,cryptonomex/graphene,abitmore/bitshares-2,bigoc/openchain,cryptonomex/graphene,pmconrad/graphene,oxarbitrage/bitshares-core,bigoc/openchain,bitshares/bitshares-2,peertracksinc/muse,pmconrad/graphene,bitsuperlab/cpp-play2,abitmore/bitshares-2,abitmore/bitshares-2