Securitycenter: overlooked synth changes. (#6439)
Securitycenter: overlooked synth changes. (#6439)

The *effects* were merged in #6348, but not the synth changes themselves.
tswast/google-cloud-python,dhermes/google-cloud-python,tseaver/google-cloud-python,jonparrott/google-cloud-python,jonparrott/gcloud-python,tseaver/google-cloud-python,tswast/google-cloud-python,dhermes/google-cloud-python,GoogleCloudPlatform/gcloud-python,googleapis/google-cloud-python,jonparrott/google-cloud-python,dhermes/google-cloud-python,dhermes/gcloud-python,tseaver/google-cloud-python,GoogleCloudPlatform/gcloud-python,tswast/google-cloud-python,dhermes/gcloud-python,googleapis/google-cloud-python,jonparrott/gcloud-python