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.
- Rename Compiler.Common.Tests to Microsoft.DotNet.Compiler.Common.Tests.
- Create the Microsoft.DotNet.Cli.Utils.Tests and move StreamForwarderTests to it.
- ArgumentForwardingTests will be moved here in the future
- Remove LoadContextTest, since it is old and no longer relevant.
Partial #1250
