test: Remove confusing and broken use of wait_until global
test: Remove confusing and broken use of wait_until global

Former-commit-id: ee7b4f7d284b28fbd06c1d2514cc396ce747ebba
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin