Ticket #48135 - memory leak in new_passwdPolicy (1.2.11 only)
Description: A password policy object stashed in pblock was not released
when the pblock was destroyed. It's already fixed in the 1.3.x branches
by Ticket #147 - Internal Password Policy usage very inefficient.
Backporting the pblock_done code.
https://fedorahosted.org/389/ticket/48135
Reviewed by rmeggins@redhat.com (Thank you, Rich!!)