Description of problem:
When the export file is edited on the fly, then for proper working of netgroup/export authentication requires nfs-server restarts.
Steps to Reproduce:
1.create and start a volume.
2.edit export file (/var/lib/glusterd/nfs/exports) by adding localhost and volume name as entry
3.enable nfs.exports-auth-enable for that volume
4.mount the volume using ip mentioned in export file
6.edit the file again by removing the previous entry
7.try to mount the volume again.
mount succeeded .
mount should fail