https://bugzilla.redhat.com/show_bug.cgi?id=829213

Bug 830001 - unhashed#user#password visible after changing password [rhel-6.3]
https://bugzilla.redhat.com/show_bug.cgi?id=830001

Bug Description: Deref still retrieved unhashed password.

Fix Description: Added code to Deref plugin to check the deref attribute.
If it is unhashed password, skip it.