Fix Dropbox issue with socket leak

We did not dispose the HttpClient and its Response causing a leak in sockets and PICO limited at 250 handles.   Although, in time, GC will clean up and user can retry, the fix is dispose punctually.  I validate the repro before fix, apply the fix and it is no longer repro.

I also add more info (ILogger) to temp deployment in case of failures so users can diagnose what the issue could be.