Problem Summary:
Defining global variables in a test suite can easily introduce errors,
such as variable conflicts in concurrent scenarios. In #44576 , a method
for detecting global variables was introduced.
That approach conflicts with the function calling like
connect(user=user, password="pwd"). Furthermore, the connect(user=user,
password="pwd") method cannot specify assignments to parameters with
default values; values still need to be assigned according to the order
of parameters. Therefore, modifying these calling method.
1c47f5cf57