* Move dotnet-new templates to Sdk attribute
* Update to MSBuild 15.1.0-preview-000454-01
To pick up a fix for Microsoft/msbuild#1431.
* Fix template newlines
* Fix casing on Microsoft.Net.Sdk
* Move migration test csproj's to Sdk attribute
* Disable parallel sdk restore
Each SDK restore operation will try to manipulate the same assets.json file since the dependency name&version are injected into a common csproj file. This can cause runtime failures when two NuGets try to restore the project at once.
* Make casing of SDK 'NET' and not 'Net'
* Remove redundatn imports
* Fix test string
* Additional race
* Replacing the SDK with the Web.Sdk when it is a Web project.
* Fixing the test by writting the csproj before running the migration rule.
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