LU-1308 Properly add multihomed nids to peer table

LU-1308 Properly add multihomed nids to peer table

class_add_uuid had a copy&paste error where it was checking against
wrong entry for nid tables and as such had trouble finding multihomed
nid configurations.

Change-Id: I2d73bdde9cf7b0bf882b14b473b4491873e64c25
Signed-off-by: Oleg Drokin <green@whamcloud.com>
Reviewed-on: http://review.whamcloud.com/2561
Reviewed-by: Jinshan Xiong <jinshan.xiong@whamcloud.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Mike Pershin <tappro@whamcloud.com>