Automator: update common-files@master in istio/api@master (#3156)

Author: istio-testing

common/.commonfiles.sha

@@ -1 +1 @@
-0fb04a469bfc93ac7466cb401ee46c84d58cb23c
+79fdfc73f80957004f387ae8dae2cef2b6b6ab59

common/scripts/kind_provisioner.sh

@@ -172,14 +172,15 @@ function setup_kind_cluster() {
   if [[ -z "${CONFIG}" ]]; then
     # Kubernetes 1.15+
     CONFIG=${DEFAULT_CLUSTER_YAML}
-    # Configure the cluster IP Family only for default configs
-    if [ "${IP_FAMILY}" != "ipv4" ]; then
-      grep "ipFamily: ${IP_FAMILY}" "${CONFIG}" || \
-      cat <<EOF >> "${CONFIG}"
+  fi
+
+  # Configure the cluster IP Family if explicitly set
+  if [ "${IP_FAMILY}" != "ipv4" ]; then
+    grep "ipFamily: ${IP_FAMILY}" "${CONFIG}" || \
+    cat <<EOF >> "${CONFIG}"
 networking:
   ipFamily: ${IP_FAMILY}
 EOF
-    fi
   fi
 
   KIND_WAIT_FLAG="--wait=180s"