Updated Nuget package description. (microsoft#1286)

* Updated Nuget package description.

* More changes.

* PR feedback.

src/package/nuspec/Microsoft.TestPlatform.Portable.nuspec

@@ -7,7 +7,7 @@
     <authors>Microsoft</authors>
     <owners>Microsoft</owners>
     <requireLicenseAcceptance>true</requireLicenseAcceptance>
-    <description>This package contains a subset of binaries for the Visual Studio Test Platform (vstest). vstest provides a modern, cross platform testing engine that also powers the testing on .NET Core. Supports the following popular test frameworks - MSTest V2, xUnit and Nunit with support for extensibility. Visit https://github.com/microsoft/vstest to know more about vstest platform. If you need to support legacy test execution via TMI or tests based on [MSTest V1, Ordered, Generic, Web, Cuit], please use Microsoft.TestPlatform package.</description>
+    <description>This package contains a subset of binaries for the Visual Studio Test Platform (vstest). vstest provides a modern, cross platform testing engine that also powers the testing on .NET Core. Supports the following popular test frameworks - MSTest v2, xUnit and Nunit with support for extensibility. Visit https://github.com/microsoft/vstest to know more about vstest platform. For running tests based on the MSTest v1 framework, .orderedtest, .webtest and .generictest please use Microsoft.TestPlatform package.</description>
     <licenseUrl>https://www.visualstudio.com/microsoft-visual-studio-test-platform</licenseUrl>
     <iconUrl>http://go.microsoft.com/fwlink/?LinkID=288859</iconUrl>
     <projectUrl>https://github.com/microsoft/vstest/</projectUrl>

src/package/nuspec/Microsoft.TestPlatform.nuspec

@@ -7,7 +7,7 @@
     <authors>Microsoft</authors>
     <owners>Microsoft</owners>
     <requireLicenseAcceptance>true</requireLicenseAcceptance>
-    <description>This package contains full set of binaries for the Visual Studio Test Platform (vstest). vstest provides a modern, cross platform testing engine that also powers the testing on .NET Core. Supports the following popular test frameworks - MSTest V2, xUnit and Nunit with support for extensibility. Visit https://github.com/microsoft/vstest to know more about vstest platform.</description>
+    <description>This package contains full set of binaries for the Visual Studio Test Platform (vstest). vstest provides a modern, cross platform testing engine that also powers the testing on .NET Core. Supports the following popular test frameworks - MSTest(v1 and v2), xUnit and Nunit with support for extensibility. Visit https://github.com/microsoft/vstest to know more about vstest platform.</description>
     <licenseUrl>https://www.visualstudio.com/microsoft-visual-studio-test-platform</licenseUrl>
     <iconUrl>http://go.microsoft.com/fwlink/?LinkID=288859</iconUrl>
     <projectUrl>https://github.com/microsoft/vstest/</projectUrl>