Changing the position of nfs-ganesha.log

Changing the position of ganesha.log from /tmp/ganesha.log
to /var/log/nfs-ganesha/ganesha.nfsd.log

Change-Id: Iff95fbc7fc690f4fdbc1789d84f3e41aaca9045b
BUG: 1116723
Signed-off-by: Meghana Madhusudhan <mmadhusu@redhat.com>
Reviewed-on: http://review.gluster.org/8249
Reviewed-by: soumya k <skoduri@redhat.com>
Reviewed-by: Humble Devassy Chirammal <humble.devassy@gmail.com>
Reviewed-by: Raghavendra Talur <rtalur@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>