Upgrade xscl40

To upgrade xscl to 4.0 version. Changed projects of:
Common\Commands.Common.Storage\Commands.Common.Storage.csproj
Commands.Common.Test\Commands.Common.Test.csproj
Commands.ScenarioTest\Commands.ScenarioTest.csproj
ResourceManager\Resources\Commands.Resources\Commands.Resources.csproj
ServiceManagement\Compute\Commands.ServiceManagement\Commands.ServiceManagement.csproj
ServiceManagement\Compute\Commands.ServiceManagement.PlatformImageRepository\Commands.ServiceManagement.PlatformImageRepository.csproj
ServiceManagement\Compute\Commands.ServiceManagement.Preview\Commands.ServiceManagement.Preview.csproj
ServiceManagement\Compute\Commands.ServiceManagement.Test\Commands.ServiceManagement.Test.csproj
ServiceManagement\Compute\Sync\Sync.csproj
ServiceManagement\Services\Commands\Commands.csproj
ServiceManagement\Services\Commands.ExpressRoute\Commands.ExpressRoute.csproj
ServiceManagement\Services\Commands.Test\Commands.Test.csproj
ServiceManagement\Services\Commands.Test.Utilities\Commands.Test.Utilities.csproj
ServiceManagement\Services\Commands.Utilities\Commands.Utilities.csproj
ServiceManagement\Sql\Commands.SqlDatabase\Commands.SqlDatabase.csproj
ServiceManagement\Storage\Commands.Storage\Commands.Storage.csproj
ServiceManagement\Storage\Commands.Storage.ScenarioTest\Commands.Storage.ScenarioTest.csproj
ServiceManagement\Storage\Commands.Storage.StorageTestLib\Commands.Storage.StorageTestLib.csproj
ServiceManagement\Storage\Commands.Storage.Test\Commands.Storage.Test.csproj