Edits to remove "fail" references, plus edits to "stopped by mistake" dialog.

Bugs: 5174094 and 5165745

Change-Id: Ie3e94b4fd5c814a5cbb52af7e2b8c8568ed0b89a

Reverted change from "failed" to "unsuccessful" on line 1928 per Dianne. This is a message to someone running a low-level factory test.

Adding escape to single quote.