LU-13098 ptlrpc: supress connection restored message

LU-13098 ptlrpc: supress connection restored message

if that happens on idling connection.

Lustre-change: https://review.whamcloud.com/37086
Lustre-commit: 7aa58847b94d0ebb2796774a2de2183ba7f8cc4b

Fixes: 5a6ceb664f07 ("LU-7236 ptlrpc: idle connections can disconnect")
Signed-off-by: Alex Zhuravlev <bzzz@whamcloud.com>
Change-Id: I506665d427f3e77477f53e2d3059bcb1daaf0318
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Amir Shehata <ashehata@whamcloud.com>
Signed-off-by: Minh Diep <mdiep@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/37315
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>