vhost-user-blk: reconnect on any error during realize

vhost-user-blk: reconnect on any error during realize

vhost-user-blk realize only attempts to reconnect if the previous
connection attempt failed on "a problem with the connection and not an
error related to the content (which would fail again the same way in the
next attempt)".

However this distinction is very subtle, and may be inadvertently broken
if the code changes somewhere deep down the stack and a new error gets
propagated up to here.

OTOH now that the number of reconnection attempts is limited it seems
harmless to try reconnecting on any error.

So relax the condition of whether to retry connecting to check for any
error.

This patch amends a527e312b5 "vhost-user-blk: Implement reconnection
during realize".

Signed-off-by: Roman Kagan <rvkagan@yandex-team.ru>
Message-Id: <20211111153354.18807-2-rvkagan@yandex-team.ru>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>