refkit_poky.py: more thorough test_compat_meta_refkit_core
refkit_poky.py: more thorough test_compat_meta_refkit_core

By adding several layers to the base configuration, we also catch
signature changes in recipes that are in those layers (example: lvm2).

Signed-off-by: Patrick Ohly <0fc9d825c622b2a5ac5160289c29f03654b10648@intel.com>

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