Automate agent update in opbeans-dotnet after release

[gregkalapos]

Currently in the demo environment, Opbeans-dotnet runs on an old version.

There is a step after release to bump the version, but that fails, because the new version isn't available in NuGet immediately.

ToDos:

• [ ] Make sure demo environment has the latest .NET Agent version.
• [ ] Try to automate the update process