Fix 'list_entries' example with projects. (#8858)
Fix 'list_entries' example with projects. (#8858)

Closes #7916.
tseaver/google-cloud-python,GoogleCloudPlatform/gcloud-python,tswast/google-cloud-python,tswast/google-cloud-python,googleapis/google-cloud-python,GoogleCloudPlatform/gcloud-python,tseaver/google-cloud-python,googleapis/google-cloud-python,tseaver/google-cloud-python,tswast/google-cloud-python