CA-209401: add a default value for NFS other_config
CA-209401: add a default value for NFS other_config

Signed-off-by: Zheng Li <e351a3eb690a359d8e02cebc130a21bc4c39d357@citrix.com>
Reviewed-by: Chandrika Srinivasan <51ae5eeda27fe08017d2d63c87755f0707891830@citrix.com>

germanop/sm,chandrikas/sm,kostaslamda/sm,chandrikas/sm,kostaslamda/sm,xapi-project/sm,chandrikas/sm,xapi-project/sm,germanop/sm,xapi-project/sm,germanop/sm,kostaslamda/sm