fix(pool): more robust placement of reconnection attempts

fix(pool): more robust placement of reconnection attempts

The problem reported in #1176 is the close recursion already fixed.
However, because we try to reconnect before closing, we end up scheduling
a reconnection attempt for every recursion loop.

The recursion shouldn't happen anymore, but it seems more robust to
reconnect after the connection has been successfully closed, otherwise
we might end up requesting more connections than we ought (hopefully not
as dramatically as here anyway).