Unit tests for LDAP Email extraction
The ldap 'mail' attribute should be extracted when possible.

https://www.pivotaltracker.com/story/show/73739372
[#73739372]
Extract LDAP mail attribute for LDAP authenticated users
When a user is authenticated against LDAP it is import to attempt to extract the mail attribute for notifications within CF.
https://www.pivotaltracker.com/story/show/73739372
[#73739372]
Merge branch 'feature/extract_ldap_mail_attribute' into develop
    https://www.pivotaltracker.com/story/show/73739372
    [#73739372]