Fix the NuGet error (#496)
Fix the NuGet error (#496)

* Fix the Nuget error

* Update cartservice dockerfile to official temp fix
GoogleCloudPlatform/microservices-demo,GoogleCloudPlatform/microservices-demo,GoogleCloudPlatform/microservices-demo,GoogleCloudPlatform/microservices-demo,GoogleCloudPlatform/microservices-demo,GoogleCloudPlatform/microservices-demo,GoogleCloudPlatform/microservices-demo