Switch the importlayer.js to use the new REST API for importing a new layer.
(Bitbake rev: 6475fd7e0d2488bf300b75322f2c00297cd1440b)
Signed-off-by: Michael Wood <michael.g.wood@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>