Upped timeout and added logs for downloading and publishing operation

[epananth]

To double check:

• The right tests are in and and the right validation has happened. Guidance: https://github.com/dotnet/core-eng/tree/master/Documentation/Validation

[riarenas]

I think we should use Stopwatch instead of DateTime subtraction for our timing

[riarenas]

Do you have any example builds? Just to see how readable the logs are with these changes

[epananth]

Running a build now https://dnceng.visualstudio.com/internal/_build/results?buildId=1126019&view=results, I will post the log here after this completes

[epananth]

[epananth]

downloading times are not that interesting

[riarenas]

I think it would be nice to not lose the decimals in the seconds.

[epananth]

Yeah all the downloads were 0 seconds :D , made sure we have decimals for time taken