If we can't connect to the server we should error out, because it might
not be that the server is actually dead - it might just be unable to
execute commands.
(Bitbake rev: d4b921676859d6ba4e1922fa4682ee941652f483)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>