update connectionstatus in smoke test

[shizn]

Always disconnected during smoke test:

Per Azure/iotedge#2733, the current recommendation to get connectionstatus for 1.0.9 runtime is to use the ping direct method.
Our updated sample edgeSmokeTest.sh is here - Azure-Samples/azure-iot-edge-devops-sample-dotnet@87953df#diff-540e66f7c97d49837a36c35bb5f5c4b4

Please help update the script. Thanks!!

[toolboc]

@shizn, thank you for the notification. The issue has been resolved by updating edgeSmokeTest.sh in a0d7443