cloud/bigquery: fix broken tests
cloud/bigquery: fix broken tests

Change-Id: If1eb1506f988f8448d2c9375ba9c50e908f0147d

blowmage/gcloud-golang,blowmage/gcloud-golang,michael-grosshans/google-cloud-go,ptomasroos/gcloud-golang,roth1002/gcloud-golang,roth1002/gcloud-golang,hsinhoyeh/gcloud-golang,googleapis/google-cloud-go,michael-grosshans/google-cloud-go,googleapis/google-cloud-go,ptomasroos/gcloud-golang,Maksadbek/gcloud-golang,googleapis/google-cloud-go,googleapis/google-cloud-go,Maksadbek/gcloud-golang,hsinhoyeh/gcloud-golang