Ticket #47770 - #481 breaks possibility to reassemble memberuid list
Description: Patch to implement #481 "expand nested posix groups"
wiped out the code in posix_group_fix_memberuid_callback (posix-
group-task.c) to add memberuid if the entry is a posix group.
This patch adds the code back.
Plus fixed a couple of memory leaks and renamed a posix winsync
local function plugin_op_all_finished to posix_winsync_plugin_op_
all_finished not to confuse valgrind.
https://fedorahosted.org/389/ticket/47770
Reviewed by rmeggins@redhat.com (Thank you, Rich!!)
(cherry picked from commit 8d5410e2e08f2e6fdabe9ab1dc3e97b20842a34d)