meta-iotqa: Check if profile test manifest exists
meta-iotqa: Check if profile test manifest exists

If a new profile is added without adding a test manifest for it this part
of the code shouldn't cause an error.

Signed-off-by: Simo Kuusela <4755938158c3c622d3884e9a75ed20dc865bc695@intel.com>

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