Enhanced support for EventHub and minor convention changes for Azure SDK

[lmolkova]

Changes

Support latest Azure SDK conventions https://gist.github.com/lmolkova/e4215c0f44a49ef824983382762e6b92#file-z_azure_monitor_exporter_mapping-md

Checklist

• I ran Unit Tests locally.
• CHANGELOG.md updated with one line description of the fix, and a link to the original issue if available.

For significant contributions please make sure you have completed the following items:

• Design discussion issue #
• Changes in public surface reviewed

The PR will trigger build, unit tests, and functional tests automatically. Please follow these instructions to build and test locally.

Notes for authors:

• FxCop and other analyzers will fail the build. To see these errors yourself, compile localy using the Release configuration.

Notes for reviewers:

• We support comment build triggers
  • /AzurePipelines run will queue all builds
  • /AzurePipelines run <pipeline-name> will queue a specific build

[TimothyMothra]

I would like to release a 2.14-Beta1 by Fri/Mon and I would like this to be included. :)