Normalize the errors generated by the response factory and the exception handler.

Signed-off-by: Jason Lewis <jason.lewis1991@gmail.com>
Test coverage for exception event handler.

Signed-off-by: Jason Lewis <jason.lewis1991@gmail.com>
Updating changes.

Signed-off-by: Jason Lewis <jason.lewis1991@gmail.com>
Test coverage for exception handler.

Signed-off-by: Jason Lewis <jason.lewis1991@gmail.com>