Glance mount point is always set NFS v4 in Openstack deployed by Director

Issue

• Glance mount point is always set NFS v4 in Openstack deployed by Director

• After stack deployment, the nfs4 parameter is set in the mount point.

• storage-environment.yaml :

  ## Whether to make Glance 'file' backend a NFS mount
  GlanceNfsEnabled: true
  ## NFS share for image storage, e.g. '192.168.122.1:/export/glance'
  GlanceNfsShare: "<IP of NFS server>:/glance"
  ## Mount options for the NFS image storage mount point
  GlanceNfsOptions: "rw,sync,vers=3,context=system_u:object_r:glance_var_lib_t:s0"

• However after deployment, the fstab entry adds nfs4 for glance mount point.
• /etc/fstab mount point on controller node

# /etc/fstab
# Created by anaconda on Thu Jun 15 17:22:51 2017
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
LABEL=img-rootfs /                       xfs     defaults        0 0
<IP of NFS server>:/glance /var/lib/glance/images nfs4 bg,rw,sync,vers=3,context=system_u:object_r:glance_var_lib_t:s0 0 0
/swap swap swap defaults 0 0