download Tests DLL and run dotnet test on it

download Tests DLL and run dotnet test on it.yml

- task: DownloadPipelineArtifact@2
  inputs:
    source: 'specific'
    project: 'projectName1'
    pipeline: 5432
    path: './tests' # destinationPath
    runVersion: 'specific'
    # use specific runId to troubleshoot
    runId: 1433
- task: PowerShell@2
  displayName: 'List files, debugging purpose'
  inputs:
    targetType: 'inline'
    script: "ls -R ."             
- task: DotNetCoreCLI@2
  inputs:
    command: 'test'
    arguments: './tests/Tests.dll'