Websites strategy library update

[sergey-shandar]

Description

The PR contains some breaking changes for the Strategy library so don't merge it yet until we prepare a version change for the library.

Checklist

• I have read the Submitting Changes section of CONTRIBUTING.md
• The title of the PR is clear and informative
• The appropriate change log has been updated
• The PR does not introduce breaking changes
• If applicable, the changes made in the PR have proper test coverage
• For public API changes to cmdlets:
  • the changes have gone through a cmdlet design review
  • the cmdlet markdown files were generated using the platyPS module

[MiYanni]

@sergey-shandar Well, I was looking at the error, but the build restarted for some reason. I think you changed something in NewAzureRmWebApp that wasn't being referenced properly for NetCore. At least that is what the error indicated in Travis.

[vladimir-shcherbakov]

@sergey-shandar
What do you mean by Websites strategy library?

[vladimir-shcherbakov]

@sergey-shandar
Is it possible for you organize the commits by

1. ResourceManager/Common/Commands.Common.Strategies changes
2. ResourceManager/Compute/AzureRM.Compute changes
3. ResourceManager/Websites chages

or you may want to split up the PR into 3 and leave in the PR only changes related to Websites.

[sergey-shandar]

See this PR #6239