glusterd-volgen: add 'io-stats' xlator on server volfile too
glusterd-volgen: add 'io-stats' xlator on server volfile too

Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>

BUG: 1701 (better statistics  gathering in glusterd)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1701

Kaushikbv/Gluster,Kaushikbv/Gluster,Kaushikbv/Gluster