LU-17906 ptlrpc: reduce time for connection switch

LU-17906 ptlrpc: reduce time for connection switch

If connection peer is not ready then reduce request
timeout for it to 1s, switching all imports connections
faster until some is ready

If connection status become ready after not-ready, try
it first to connect

Signed-off-by: Mikhail Pershin <mpershin@whamcloud.com>
Change-Id: I87f2359f3a767ea9e52ce9da4cd5cf9b42b56320
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/57234
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>