Description of problem:
=======================
Done the remove-brick when glusterd is down in half of the cluster nodes, rebalance failed with issue "Failed to Fix the Layout" and commit et passed.


Version-Release number of selected component (if applicable):
=============================================================
glusterfs-3.7.5-9


How reproducible:
=================
Always


Steps to Reproduce:
===================
1. Create a distributed-replicate volume ( 2x2, with one brick on each
 server in a 4-server cluster ), start and mount, create data on mount point.
2. Kill glusterd on node1 and node2 ( these hold bricks that form one replica pair )
3. Start remove-brick on the volume ( other two bricks )
4. Check the remove-brick status  //will see failures
5. Do remove-brick commit // will pass

Actual results:
===============
remove brick commit is happening with re-balance failure


Expected results:
=================
remove-brick commit should not happen when re-balance failed.



Additional info: