Revert the runtime to 2.0.6 because we need to service the SDK with a new NuGet.

Author: livarcocc

build/DependencyVersions.props

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
-    <MicrosoftNETCoreAppPackageVersion>2.0.7-servicing-26322-01</MicrosoftNETCoreAppPackageVersion>
+    <MicrosoftNETCoreAppPackageVersion>2.0.6</MicrosoftNETCoreAppPackageVersion>
     <MicrosoftNETCoreDotNetHostResolverPackageVersion>$(MicrosoftNETCoreAppPackageVersion)</MicrosoftNETCoreDotNetHostResolverPackageVersion>
     <MicrosoftBuildPackageVersion>15.6.82</MicrosoftBuildPackageVersion>
     <MicrosoftBuildFrameworkPackageVersion>$(MicrosoftBuildPackageVersion)</MicrosoftBuildFrameworkPackageVersion>

test/Microsoft.DotNet.Cli.Utils.Tests/GivenAProjectToolsCommandResolver.cs

@@ -303,7 +303,7 @@ public void ItAddsFxVersionAsAParamWhenTheToolHasThePrefercliruntimeFile()
 
             result.Should().NotBeNull();
 
-            result.Args.Should().Contain("--fx-version 2.0.7-servicing-26322-01");
+            result.Args.Should().Contain("--fx-version 2.0.6");
         }
 
         [Fact]