LU-56 lnet: allow user to bind NI on CPTs

LU-56 lnet: allow user to bind NI on CPTs

By default, NI will be bond on all CPTs, which means messages for a
NI could be handled by LND threads on any CPT (hashed by NID).
This patch add a new parameter for NI configuration, it allows user
to bind NI on specified CPT(s):

- tcp0(eth1)[0,1]
  bind NI (tcp0) on CPT0 and CPT1
- o2ib(ib0)[2-5]
  bind NI (o2ib) on CPT2,3,4,5

Expression between square brackets are CPTs that user wants this NI
to bind, if user provided this expression, messages for the NI
will only be handled by LND threads running on specified CPTs.

This is an intermediate patch, to get this feature we also need
upcoming LND patches.

Signed-off-by: Liang Zhen <liang@whamcloud.com>
Change-Id: I706a92c6da181ed0fec857cc25b5ae27a7a7c36b
Reviewed-on: http://review.whamcloud.com/3114
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Doug Oucharek <doug@whamcloud.com>
Reviewed-by: Bobi Jam <bobijam@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>