Update .exe's project.json Target Framework from dnxcore50 to netstandardapp1.5.
Update .dll's project.json Target Framework from dnxcore50 to netstandard1.3.
Adding workaround for DataContractSerialization to src\dotnet\project.json to fix crossgen issue.
Build 23901 has a dependency issue that doesn't allow the runtime.any.System.Private.DataContractSerialization
package to be restored. When we move to a new build of CoreFX we should take this workaround out.
Adding a message handler for the version check message. Also introduced an IDotnetTest that handles state and handlers (the state machine).
Adding the test discover start message handler and introducing a test runner.
Added the handler for the GetTestRunnerProcessInfo message. Also, modified dotnet test to have separate setter for the special message handlers for terminate and unknown messages and added a separate method to add new reporting channels to DotnetTest, so that it can handle the new listener for the test runner.
Added the test runner test discovery handlers.
Added handlers to deal with the test execution itself.
Updated dotnet-test program to use the message handlers during design time.
Added a test for the whole discover tests message flow.
Added a test for the run tests full message exchange.
