Before 10.2 you set the nfs when deploying the ova. Now you have to set it after deploy into the configuration page.
There is a script called nfsValidate.py that checks nfs permissions and other things. It seems to be that there is a known issue with freenas/truenas.
You can bypass that file or you can try to set your nfs mount point in vcenter as follow:
1. Stop vcloud appliance
2. Go to vcloud appliance > configure > vapp options
and set the property vcloudapp.nfs_mount.VMware_vCloud_Director pointing to your nfs share