don't initialize a client with a real transport in logging test (#1326)
don't initialize a client with a real transport in logging test (#1326)

this client will start to try making connections to the default
APM Server, fail to reach it, and spam the log with connection
errors.
beniwohli/apm-agent-python,beniwohli/apm-agent-python,beniwohli/apm-agent-python,beniwohli/apm-agent-python