host/cli: Don’t panic if mariadb app info doesn’t exist in backup
host/cli: Don’t panic if mariadb app info doesn’t exist in backup

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