Explicitly exclude items from default content include instead of rely…

…ing on .NET SDK to remove them

Corresponds with dotnet/sdk#630

src/Web/Microsoft.NET.Sdk.Web.ProjectSystem.Targets/netstandard1.0/Microsoft.NET.Sdk.Web.ProjectSystem.props

@@ -12,17 +12,17 @@ Copyright (c) .NET Foundation. All rights reserved.
 
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
-    <DefaultRemoves>$(DefaultRemoves);node_modules/**</DefaultRemoves>
-    <DefaultRemoves>$(DefaultRemoves);jspm_packages/**</DefaultRemoves>
-    <DefaultRemoves>$(DefaultRemoves);bower_components/**</DefaultRemoves>
+    <DefaultItemExcludes>$(DefaultItemExcludes);node_modules/**</DefaultItemExcludes>
+    <DefaultItemExcludes>$(DefaultItemExcludes);jspm_packages/**</DefaultItemExcludes>
+    <DefaultItemExcludes>$(DefaultItemExcludes);bower_components/**</DefaultItemExcludes>
 
     <OutputType>Exe</OutputType>
     <PreserveCompilationContext Condition="'$(PreserveCompilationContext)' == ''">True</PreserveCompilationContext>
   </PropertyGroup>
 
   <ItemGroup Condition=" '$(EnableDefaultItems)' == 'true' And '$(EnableDefaultContentItems)' == 'true' ">
     <!-- Publish everything under wwwroot, all JSON files, all web.config files and all Razor files -->
-    <Content Include="wwwroot/**;**/*.json;**/web.config;**/*.cshtml" CopyToPublishDirectory="PreserveNewest" />
+    <Content Include="wwwroot/**;**/*.json;**/web.config;**/*.cshtml" CopyToPublishDirectory="PreserveNewest" Exclude="$(DefaultItemExcludes);$(DefaultExcludesInProjectFolder)" />
 
     <!-- Set CopyToPublishDirectory to Never for items under AppDesignerFolder ("Properties", by default) to avoid publishing launchSettings.json -->
     <Content Update="$(AppDesignerFolder)/**" CopyToPublishDirectory="Never" Condition="'$(AppDesignerFolder)' != ''"/>