bigquery: table#copyFrom: correctly unit test
bigquery: table#copyFrom: correctly unit test

googleapis/google-cloud-node,googleapis/google-cloud-node,GoogleCloudPlatform/gcloud-node,jgeewax/gcloud-node,googleapis/google-cloud-node,GoogleCloudPlatform/gcloud-node,callmehiphop/gcloud-node,GoogleCloudPlatform/gcloud-node,jgeewax/gcloud-node,googleapis/google-cloud-node,callmehiphop/gcloud-node