Fix recommendation engine APIs along with resource property fixes, add new APIs and tests

[michimune]

Description

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This checklist is used to make sure that common guidelines for a pull request are followed.

• Please add REST spec PR link to the SDK PR 2548
• I have read the contribution guidelines.
• The pull request does not introduce breaking changes.

General Guidelines

• Title of the pull request is clear and informative.
• There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, see this page.

Testing Guidelines

• Pull request includes test coverage for the included changes.

SDK Generation Guidelines

• If an SDK is being regenerated based on a new swagger spec, a link to the pull request containing these swagger spec changes has been included above.
• The generate.cmd file for the SDK has been updated with the version of AutoRest, as well as the commitid of your swagger spec or link to the swagger spec, used to generate the code.
• The *.csproj and AssemblyInfo.cs files have been updated with the new version of the SDK.

[dsgouda]

Please run generate.cmd to generate the code. This should also generate a .txt file, please commit the file.
(If the file is not generate please pull down the latest changes and try again)

[michimune]

I ran generate.cmd and a file named src\SDKs_metadata\web_resource_manager.txt was created. Is this what I need to commit?

[dsgouda]

@michimune yes

[michimune]

@dsgouda Pushed the .txt file.

[dsgouda]

LGTM

[dsgouda]

@shahabhijeet please merge when ready

[dsgouda]

@michimune There are few more things to be done here

1. Msbuild build.proj (this will download latest build tools)
2. Use generate.cmd to generate your SDK
3. Build you sdk using msbuild build.proj /t:Build /p:Scope=SDKs\Websites
4. This will add all the meta data that is required

This should update the .props file and also generate a new SDKInfo*.cs file. Please commit these changes.

[michimune]

@dsgouda Pushed another commit. How does this look?

[dsgouda]

@michimune taking a look

[dsgouda]

LGTM @shahabhijeet PTAL and merge

[michimune]

Thank you!