A new branch 'sdk_4.2' for version 4.2 of the SDK has just been created
and a new 4.3.0 release of the model has been published. This patch
pdates the 'master' branch of the SDK so that it uses the new version
of the model and updates the version number to 4.3.

Change-Id: Iba973420300cf2c2c290b6ccdf2518c19c246b91
Signed-off-by: Ondra Machacek <omachace@redhat.com>