glusterfsd: consider xlator type too in topology check

When cluster.nufa option is enabled, we only change the translator
type, but leave the translator name as-is. This results in the
topology change check to conclude that a graph switch is not needed.

Change-Id: I4f4d0cec2bd4796c95274f0328584a4e7b8b5cd3
BUG: 975599
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/5244
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com>