Description of problem:
Edit /etc/fstab and test with "mount -av" return:
"...
/sbin/mount.glusterfs: illegal option -- v
..."

With "mount -a" works fine

Version-Release number of selected component (if applicable):
Checked with RHEL 7.2 and glusterfs 3.7.1
Checked with CentOS 7.1.1503 and glusterfs 3.7.6

How reproducible:
Allways


Steps to Reproduce:
1.Edit /etc/fstab and add "localhost:/media	/mnt/media	glusterfs	defaults,_netdev	0 0"
2.Run "mount -av" = Return error and don't mount
3.Run "mount -a" = works fine

Expected results:
1.Run "mount -av" and mount as expected