bisync: fix integration tests after sftp log changes

We added a new log message here which we need to ignore in the bisync tests

3658470022 sftp: warn the user if no host key validation is configured

cmd/bisync/bisync_test.go

@@ -85,6 +85,8 @@ var logReplacements = []string{
 	`^NOTICE: .*?: Replacing invalid UTF-8 characters in "[^"]*"$`, dropMe,
 	// ignore rclone debug messages
 	`^DEBUG : .*$`, dropMe,
+	// ignore SFTP host key messages
+	`^NOTICE: .*?No host key validation is being performed.*$`, dropMe,
 	// ignore dropbox info messages
 	`^NOTICE: too_many_(requests|write_operations)/\.*: Too many requests or write operations.*$`, dropMe,
 	`^NOTICE: .*?: Forced to upload files to set modification times on this backend.$`, dropMe,