LU-9480 lnet: show peer state

LU-9480 lnet: show peer state

It is important to show the peer state when debugging.
This patch exports the peer state from the kernel to
user space, and is shown when the detail level requested
in the peer show command is >= 3

Test-Parameters: trivial
Signed-off-by: Amir Shehata <amir.shehata@intel.com>
Signed-off-by: Olaf Weber <olaf@sgi.com>
Change-Id: I1e169b2b7bf80671ea302f04c6fb948bbcbbb245
Reviewed-on: https://review.whamcloud.com/26130
Reviewed-by: Olaf Weber <olaf.weber@hpe.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>