test/apps/ish: Don't log startup messages
test/apps/ish: Don't log startup messages

This allows assertions on the exact log lines returned from the app.

Signed-off-by: Jonathan Rudenberg <3692bfa45759a67d83aedf0045f6cb635a966abf@titanous.com>

flynn/flynn,flynn/flynn,benbjohnson/flynn,philiplb/flynn,benbjohnson/flynn,lmars/flynn,philiplb/flynn,benbjohnson/flynn,flynn/flynn,flynn/flynn,philiplb/flynn,rikur/flynn,rikur/flynn,lmars/flynn,flynn/flynn,rikur/flynn,rikur/flynn,lmars/flynn,benbjohnson/flynn,philiplb/flynn,benbjohnson/flynn,philiplb/flynn,rikur/flynn,benbjohnson/flynn,lmars/flynn,rikur/flynn,lmars/flynn