Remove WebsitesController

[ziyuezh576]

Description

Comparing with WebsitesController.cs, added these configuration of creating a WebsitesTestRunner instance to WebsitesTestRunner.cs.

                .WithNewRmModules(helper => new[]
                {
                    helper.GetRMModulePath("AzureRM.Network.psd1"),
                    helper.GetRMModulePath("AzureRM.KeyVault.psd1")
                })
                .WithNewRecordMatcherArguments (
                    userAgentsToIgnore: new Dictionary<string, string>
                    {
                        {"Microsoft.Azure.Management.ResourceManager.ResourceManagementClient", "2017-05-10"},
                        {"Microsoft.Azure.Management.Internal.Resources.ResourceManagementClient", "2016-09-01"}
                    },
                    resourceProviders: new Dictionary<string, string>
                    {
                        {"Microsoft.Websites", null},
                        {"Microsoft.Network", null},
                        {"Microsoft.KeyVault", null},
                        {"Microsoft.Storage", null}
                    }
                )

Checklist

• I have read the Submitting Changes section of CONTRIBUTING.md
• The title of the PR is clear and informative
• The appropriate ChangeLog.md file(s) has been updated:
  • For any service, the ChangeLog.md file can be found at src/{{SERVICE}}/{{SERVICE}}/ChangeLog.md
  • A snippet outlining the change(s) made in the PR should be written under the ## Upcoming Release header -- no new version header should be added
• 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:
  • a cmdlet design review was approved for the changes in this repository (Microsoft internal only)
    • {Please put the link here}
  • the markdown help files have been regenerated using the commands listed here

[vidai-msft]

Rename above 3 AzureRM to Az.

[vidai-msft]

Default record matcher assignment can be removed.