If the cooker fails to start, ensure a correct exception is displayed to the
user. After handling any queued events simply re-raise the original exception
else the output can be unclear.
(Bitbake rev: 9a4db1aa608c17d31bf5ea1cab5a99beb565dd83)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>