test: Log domain migration stream error
test: Log domain migration stream error

This will help debug an intermittent failure of the test.

Signed-off-by: Jonathan Rudenberg <3692bfa45759a67d83aedf0045f6cb635a966abf@titanous.com>
flynn/flynn,benbjohnson/flynn,flynn/flynn,lmars/flynn,benbjohnson/flynn,flynn/flynn,lmars/flynn,philiplb/flynn,flynn/flynn,benbjohnson/flynn,philiplb/flynn,benbjohnson/flynn,benbjohnson/flynn,lmars/flynn,flynn/flynn,philiplb/flynn,lmars/flynn,lmars/flynn,benbjohnson/flynn,philiplb/flynn,philiplb/flynn