Use \A \z for start end regex instead of ^ $

This is a fix for the test_app email format validation to use the more secure match of the string start and end instead of line start and end.

The sample app was failing tests because it did not have an user#edit view
Merge pull request #257 from johnkelly/test_app_regex

In test_app, use \A \z for start end regex instead of ^ $