Updating Microsoft.NETCore.App version to final Preview2 version.

Author: StephenBonikowsky

src/Common/test-runtime/project.json

@@ -26,7 +26,7 @@
         "OpenCover": "4.6.519",
         "ReportGenerator": "2.4.3",
         "Microsoft.NETCore.TestHost": "2.0.0-preview2-25304-01",
-        "Microsoft.NETCore.App": "2.0.0-preview2-25324-03",
+        "Microsoft.NETCore.App": "2.0.0-preview2-25407-01",
         "Microsoft.DotNet.BuildTools.TestSuite": "1.0.1-prerelease-01001-04",
         "xunit.console.netcore": "1.0.3-prerelease-00925-01",
         "Microsoft.xunit.netcore.extensions": "1.0.1-prerelease-01001-04",