LU-290 Reconnects are not throttled

LU-290 Reconnects are not throttled

bz22423
Client should not try to reconnect to the same nid in a busy loop,
but instead rely on pinger to issue reconnect.

Signed-off-by: Lai Siyao <laisiyao@whamcloud.com>
Change-Id: I878093030d62173071192ca816e037464cc9248d
Reviewed-on: http://review.whamcloud.com/944
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Johann Lombardi <johann@whamcloud.com>
Reviewed-by: hongchao.zhang <hongchao.zhang@whamcloud.com>
Tested-by: hongchao.zhang <hongchao.zhang@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>