Automator: update common-files@master in istio/api@master (#3424)

Author: istio-testing

common/.commonfiles.sha

@@ -1 +1 @@
-4a811c922d5823525dc271fa6defd1978bf73286
+0569152cf7260f891ee02fcef8c10bf4f94ea606

common/scripts/kind_provisioner.sh

@@ -193,7 +193,7 @@ function setup_kind_cluster() {
     # kubectl config set clusters.kind-istio-testing.server https://istio-testing-control-plane:6443
   fi
 
-  if [[ -n "${DEVCONTAINER}" ]]; then
+  if [[ -n "${DEVCONTAINER:-}" ]]; then
     # identify our docker container id using proc and regex
     containerid=$(grep 'resolv.conf' /proc/self/mountinfo | sed 's/.*\/docker\/containers\/\([0-9a-f]*\).*/\1/')
     docker network connect kind "$containerid"