LU-6356 sptlrpc: notify OSP and LWP for sptlrpc conf change

LU-6356 sptlrpc: notify OSP and LWP for sptlrpc conf change

Add .o_set_info_async handler for OSP and LWP. This handler only
deals with sptlrpc conf change, calling sptlrpc_conf_client_adapt().
The latter is also modified to accept LUSTRE_OSP_NAME and
LUSTRE_LWP_NAME obd types.
This enables OSP and LWP to dynamically take into account security
flavor change.

Signed-off-by: Sebastien Buisson <sebastien.buisson@bull.net>
Change-Id: Ide4d9e61da708a145431f4f7993d52d2a7d29877
Reviewed-on: http://review.whamcloud.com/15552
Tested-by: Jenkins
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Andrew Perepechko <andrew.perepechko@seagate.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>