b=4019

b=4019
r=adilger

 - obd_connect() gets one more arg: connect flags
 - client_connect_import() puts this flag in imp_connect_flags
 - ptlrpc_connect_import() sends this flag to peer
 - mds_lmv_connect() passes OBD_OPT_MDS_CONNECTION when connects to MDS
 - mds_connect() looks for OBD_OPT_MDS_CONNECTION and treats
   connection with this flag as MDS-to-MDS and doesn't try
   to connect to own LMV

 this way connection to LMV gets delayed and MDS reconnects to LMV
 after recovery abort