Update API Go library with introduce `Client.Conn` method. Implement
`ClientCache.CloseAll` method which reads and closes connections of all
cached clients.
Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
Because options are not used when client is already in cache
providing them to shared cache is misleading at best.
In the worst case `dial_timeout` is set randomly (because of race
condition) which can lead to one service having `dial_timeout` of
another. Thus we set default client creation options when cache is
created.
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
With this package we can reuse already created connections.
Later on neofs-api-go will support checking connection health
and `Close` operation, so this cache could run worker and remove
unhealthy clients.
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
