Move foreman LDAP functionality to ldap_fluff

remove debugger

Addressed Petr issues during review

Removed domains and tested with ADLS

LdapError class and OpenLDAP memberuid get_logins fix

Relax activesupport dependency and add authors

Recursive OU, posixgroups search

Refactored tests and added nested groups tests

Make travis pick up different activesupport for ruby 1.8

Booleanize authenticate? result