We saw errors from duplicate loading of LocalEmail and
LoginFormatValidation. The latter resulted in a crash.

In an attempt to ensure all subclasses of Couchrest::Model::Base are
loaded Couchrest::Model::Utils::Migrate requires all files in app/models.
We have an extension that does the same for the engines.

During this process LoginFormatValidation and LocalEmail were autoloaded
when 'identity' was required. Afterwards they were required again.
It looks like rails' autoload mechanism does not play nicely with require.

So to make sure they are not autoloaded first move the concerns and
helper classes into the lib directory and require them explicitly.

MX validations relied on network connection. Only using them
in production environment now. I want to be able to develop and
test when disconnected.

CouchRest > 1.2 does not use RestClient anymore. So we should not try to
catch its errors.

close and open actions for plain opening and closing the tickets
respond_with so fields are not cleared on invalid update

the custom actions are not strictly restful. But adding a subresource felt like too much overhead and is conceptually hard to grasp (so we destroy the openess of the ticket to close it?).

Ticket.is_creator_vlidated? now actually fetches the user from the db and returns false if it does not exist.

email and regarding user fields can be set to defaults based on
created_by user.

If these fields are emptied by the submitting user they will be set to  whereas they are nil if they have not been initialized. In that case we will use meaningful defaults from the user who created the ticket.