Description of problem:
=======================
'custom extended attributes' set on a directory are not healed after bringing back the down sub-volumes.

Client:
=======
getfattr -n user.foo c
# file: c
user.foo="bar1"

Backend bricks:
===============
[root@dhcpnode1 distrepx3-b0]# getfattr -d -e hex -m . /bricks/brick0/distrepx3-b0/c
getfattr: Removing leading '/' from absolute path names
# file: bricks/brick0/distrepx3-b0/c
security.selinux=0x73797374656d5f753a6f626a6563745f723a676c7573746572645f627269636b5f743a733000
trusted.gfid=0x326aa2338e3846afa3006e873b313416
trusted.glusterfs.dht=0x00000000000000007ffffffc9ffffffa

[root@dhcpnode1 distrepx3-b0]# getfattr -d -e hex -m . /bricks/brick1/distrepx3-b1/c
getfattr: Removing leading '/' from absolute path names
# file: bricks/brick1/distrepx3-b1/c
security.selinux=0x73797374656d5f753a6f626a6563745f723a676c7573746572645f627269636b5f743a733000
trusted.gfid=0x326aa2338e3846afa3006e873b313416
trusted.glusterfs.dht=0x00000000000000009ffffffbbffffff9


Version-Release number of selected component (if applicable):
3.12.2-11.el7rhgs.x86_64

How reproducible:
1/1

Steps to Reproduce:
====================
1) Create a distributed-replicated volume and start it.
2) FUSE mount it on a client.
3) From client create few directories of depth 3.
4) Now, bring down few dht sub-vols using gf_attach command. (I brought down 2 dht sub-vol and 1 brick in another replica pair)
5) Make metadata changes to the directories. like uid, gid, perms, setxattr
6) Bring back the down sub-vols.
7) Check all the bricks for consistency.

Actual results:
================
'custom extended attributes' are not healed after bringing back the down sub-volumes

Expected results:
=================
No inconsistencies.