CI Jenkinsfile: re-arrange build stages
CI Jenkinsfile: re-arrange build stages

Instead of parallel run of pre-filled build nodes, run build steps directly.
This means build is fixed for one defined MACHINE.
Stages names are set for build sub-steps.
Github status is set for build sub-steps.

Signed-off-by: Olev Kartau <daa0e368367f231b2eec38ece459024257643988@intel.com>

jairglez/intel-iot-refkit,intel/intel-iot-refkit,ipuustin/intel-iot-refkit,klihub/intel-iot-refkit,intel/intel-iot-refkit,mythi/intel-iot-refkit,YinThong/intel-iot-refkit,klihub/intel-iot-refkit,ipuustin/intel-iot-refkit,intel/intel-iot-refkit,ipuustin/intel-iot-refkit,klihub/intel-iot-refkit,mythi/intel-iot-refkit,klihub/intel-iot-refkit,YinThong/intel-iot-refkit,jairglez/intel-iot-refkit,ipuustin/intel-iot-refkit,jairglez/intel-iot-refkit,jairglez/intel-iot-refkit,jairglez/intel-iot-refkit,intel/intel-iot-refkit,ipuustin/intel-iot-refkit,ipuustin/intel-iot-refkit,intel/intel-iot-refkit,intel/intel-iot-refkit,ipuustin/intel-iot-refkit,jairglez/intel-iot-refkit,YinThong/intel-iot-refkit,mythi/intel-iot-refkit,klihub/intel-iot-refkit,jairglez/intel-iot-refkit,mythi/intel-iot-refkit,klihub/intel-iot-refkit,YinThong/intel-iot-refkit,klihub/intel-iot-refkit,mythi/intel-iot-refkit,YinThong/intel-iot-refkit,YinThong/intel-iot-refkit,mythi/intel-iot-refkit,YinThong/intel-iot-refkit,intel/intel-iot-refkit,mythi/intel-iot-refkit