Replace newline characters with "<br/>" in factory tests when raising test error exceptions, and replace them back to "\n" in factory_Review.

This patch should make the status file easier to parse.

BUG=chrome-os-partner:1080
TEST=manual

Change-Id: Ide8389dcbf302af15ccea73b08a5f16dab01dd73

Review URL: http://codereview.chromium.org/3438007
21 files changed