tests/test-client: Log to stderr
The test-client reports command results to stdout, so make sure to log e.g. debug messages to stderr, so they don't interfere with the result test-runner reads.
Closes: #450 (closed)
The test-client reports command results to stdout, so make sure to log e.g. debug messages to stderr, so they don't interfere with the result test-runner reads.
Closes: #450 (closed)