move all tests under 1 VS solution folder
move all tests under 1 VS solution folder

Eclo/azure-iot-sdks,Eclo/azure-iot-sdks,Eclo/azure-iot-sdks,Eclo/azure-iot-sdks,Eclo/azure-iot-sdks,Eclo/azure-iot-sdks,Eclo/azure-iot-sdks,Eclo/azure-iot-sdks,Eclo/azure-iot-sdks