packaging: setup: No spaces in /etc/sysconfig/nfs

Do not put spaces around '=' in lines added to /etc/sysconfig/nfs .
Adding them breaks sysvinit-based nfs init sh scripts.

Bug-Url: https://bugzilla.redhat.com/1013347
Change-Id: Ib9e1442b764cc9aef88044b7c1595236903edecf
Signed-off-by: Yedidyah Bar David <didi@redhat.com>