Implemented vstest verb which will run the test from given container. (#4115)

* Implemented vstest verb which will run the test from given container.

* Fixed Nitpick.

* 1) Addressed PR comment
2) Added tests for vstest verb

* Using specific version of Microsoft.TestPlatform.

* Address PR comments.

Modified help text for the vstest command.
Removed unused function.

* Fixed package related issue.
--Taking reference of microsoft.testplatform.cli nuget package which has contentFolder in it so that sub folder of this nuget can also be added in cli package.
-- Removing vstest.console, vshost and datacollector from Bundletools as we dont want *.deps.json to be override

* Nitpick

* Making vstest.console arguments compatible for non windows platform

* Fix tests to run on linux machine

* Updated the microsoft.testplatform.cli nuget package version. This version has fix related to non windows machine.

* changed dapter path from bin/debug to bin/Debug

* updated nuget version of package Microsoft.TestPlatform.CLI.

* Revert "updated nuget version of package Microsoft.TestPlatform.CLI."

This reverts commit bcc26c21d11c2bd2e5259a74f9890b0fd75962c7.

* Updated version of nuget package Microsoft.TestPlatform.CLI
Added Test project in solution file

* Addressed PR comment.

* Removed unnecessary --platform argument from test

TestAssets/TestProjects/VSTestDotNetCoreProject/Tests.cs

@@ -0,0 +1,19 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace TestNamespace
+{
+    [TestClass]
+    public class VSTestTests
+    {
+        [TestMethod]
+        public void VSTestPassTest()
+        {
+        }
+		
+		[TestMethod]
+        public void VSTestFailTest()
+        {
+			Assert.Fail();
+        }
+    }
+}

TestAssets/TestProjects/VSTestDotNetCoreProject/VSTestDotNetCoreProject.csproj

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" />
+
+  <PropertyGroup>
+    <OutputType>Library</OutputType>
+    <TargetFrameworkIdentifier>.NETCoreApp</TargetFrameworkIdentifier>
+    <TargetFrameworkVersion>v1.0</TargetFrameworkVersion>
+    <OutputPath>bin\$(Configuration)\netcoreapp1.0</OutputPath>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Include="**\*.cs" />
+    <None Include="project.json" />
+  </ItemGroup>
+
+  <Import Project="$(MSBuildExtensionsPath)\Microsoft.CSharp.targets" />
+  <Target Name="AfterBuild">
+    <Copy SourceFiles="$(NuGetPackageRoot)\mstest.testadapter\1.0.3-preview\build\_common\Microsoft.VisualStudio.TestPlatform.MSTest.TestAdapter.dll" DestinationFolder="$(OutputPath)"  SkipUnchangedFiles="true"/>
+    <Copy SourceFiles="$(NuGetPackageRoot)\mstest.testadapter\1.0.3-preview\build\dotnet\Microsoft.VisualStudio.TestPlatform.MSTestAdapter.PlatformServices.dll" DestinationFolder="$(OutputPath)"  SkipUnchangedFiles="true"/>
+    <Copy SourceFiles="$(NuGetPackageRoot)\mstest.testadapter\1.0.3-preview\build\_common\Microsoft.VisualStudio.TestPlatform.MSTestAdapter.PlatformServices.Interface.dll" DestinationFolder="$(OutputPath)"  SkipUnchangedFiles="true"/>
+    <Copy SourceFiles="$(NuGetPackageRoot)\mstest.testframework\1.0.1-preview\lib\dotnet\Microsoft.VisualStudio.TestPlatform.TestFramework.dll" DestinationFolder="$(OutputPath)"  SkipUnchangedFiles="true"/>
+    <Copy SourceFiles="$(NuGetPackageRoot)\mstest.testframework\1.0.1-preview\lib\dotnet\Microsoft.VisualStudio.TestPlatform.TestFramework.Extensions.dll" DestinationFolder="$(OutputPath)"  SkipUnchangedFiles="true"/>
+  </Target>
+</Project>

TestAssets/TestProjects/VSTestDotNetCoreProject/project.json

@@ -0,0 +1,21 @@
+{
+  "dependencies": {
+    "MSTest.TestAdapter": "1.0.3-preview",
+    "MSTest.TestFramework": "1.0.1-preview"
+  },
+  "frameworks": {
+    "netcoreapp1.0": {
+      "dependencies": {
+        "Microsoft.NETCore.Sdk": "1.0.0-alpha-20160914-1",
+        "Microsoft.NETCore.App": {
+          "version": "1.0.1",
+          "type": "platform"
+        }
+      },
+      "imports": [
+        "dnxcore50",
+        "portable-net45+win8"
+      ]
+    }
+  }
+}