Description of problem:
=======================
Inconsistent custom xattr on directories after bringing back the down sub-volume.

Version-Release number of selected component (if applicable):
3.12.2-13.el7rhgs.x86_64

How reproducible:
always

Steps to Reproduce:
===================
1) Create a distributed-replicate volume and start it.
2) FUSE mount on a client.
3) From mount, create a directory "dir".
4) set custom attribute for directory "dir" and verify it on all server.
5) Bring down a sub-volume.
6) Remove the xattr set for directory "dir".
7) Bring back the down sub-volume.
8) Send a lookup from mount point.
9) Check for the xattr on the directory on the down subvols.

Actual results:
===============
Removed xattr are still seen after bringing back the down subvols. Leading to inconsistency.

Expected results:
=================
Custom xattr should be consistent across all the subvols.

Additional info:
[     OK] Disk used percentage  path=/  percentage=19
[     OK] Disk used percentage  path=/var  percentage=19
[     OK] Disk used percentage  path=/tmp  percentage=19
[     OK] All peers are in connected state  connected_count=5  total_peer_count=5
[     OK] no gfid mismatch
[ NOT OK] Failed to check op-version
[     OK] The maximum size of core files created is set to unlimted.
[  ERROR] Report failure  report=report_check_worker_restarts
[  ERROR] Report failure  report=report_non_participating_bricks
[     OK] Glusterd is running  uptime_sec=596907
[WARNING] Errors in Glusterd log file  num_errors=89
[WARNING] Warnings in Glusterd log file  num_warning=32
[     OK] No errors seen at network card
[     OK] No errors seen at network card
High CPU usage by Self-heal
[WARNING] Errors in Glusterd log file num_errors=122
[WARNING] Warnings in Glusterd log file num_warnings=51