Merge branch 'disable-usage-ping-review-apps' into 'master'

Disable usage pings in review apps

See merge request gitlab-org/gitlab-ce!22965

scripts/review_apps/review-apps.sh

@@ -136,6 +136,7 @@ HELM_CMD=$(cat << EOF
   helm upgrade --install \
     --wait \
     --timeout 600 \
+    --set global.appConfig.enableUsagePing=false \
     --set releaseOverride="$CI_ENVIRONMENT_SLUG" \
     --set global.hosts.hostSuffix="$HOST_SUFFIX" \
     --set global.hosts.domain="$REVIEW_APPS_DOMAIN" \