Restrict rootwrap find filter for NetAppNFS driver

Additional make the name of the filter unique, so it does not override
any other rule. Like the find rule of the GPFS driver.
Rootwrap is making use of plain python ConfigParser which handles INI files
with key=value pair like fashion. Where the key is unique.

Closes-Bug: 1250101

Change-Id: Id2f193485089e12f00008b38fad2b95a09674ff2
Merge "Restrict rootwrap find filter for NetAppNFS driver"