ZF-2445: Unit tests to pass and achieve >=80% code coverage

Description

Unit tests for {{Zend_Auth_Adapter_Ldap}} and {{Zend_Ldap}} components must pass and achieve >= 80% lines of code coverage.

This includes setting up LDAP services against which to test.

Comments

Having successfully tested and receiving over 80% code coverage for each component, this issue is resolved.