Refs #34, move server specific information into new class and allow multiple LDAP servers to be configured. The first server for which a connection succeeds is used.
Refs #34, update LdapUsers unit tests.
Refs #34, get AutoCreateUserTest and ConnectionTest to pass.
Refs #34, add new integration tests for multiple servers and backwards compatibility, add custom exception for connection issues, make sure LDAP client will communicate w/ server on connection (to check if connection is valid), translate exception message thrown when no LDAP server can be connected and refactor common integration test code into common base.
See if build will pass without updating credentials in LdapUsers DAO (will have to replicate logic later anyway).
Remove allowed failure for latest_stable w/ PHP 5.5.