bump k8s ver for tests

Author: hors

Jenkinsfile

@@ -12,7 +12,7 @@ void createCluster(String CLUSTER_SUFFIX) {
                 gcloud auth activate-service-account --key-file $CLIENT_SECRET_FILE
                 gcloud config set project $GCP_PROJECT
                 gcloud container clusters list --filter $CLUSTER_NAME-${CLUSTER_SUFFIX} --zone $region --format='csv[no-heading](name)' | xargs gcloud container clusters delete --zone $region --quiet || true
-                gcloud container clusters create --zone $region $CLUSTER_NAME-${CLUSTER_SUFFIX} --cluster-version=1.25 --machine-type=n1-standard-4 --preemptible --disk-size 30 --num-nodes=3 --network=jenkins-vpc --subnetwork=jenkins-${CLUSTER_SUFFIX} --no-enable-autoupgrade --cluster-ipv4-cidr=/21 --labels delete-cluster-after-hours=6 --enable-ip-alias --workload-pool=cloud-dev-112233.svc.id.goog && \
+                gcloud container clusters create --zone $region $CLUSTER_NAME-${CLUSTER_SUFFIX} --cluster-version=1.26 --machine-type=n1-standard-4 --preemptible --disk-size 30 --num-nodes=3 --network=jenkins-vpc --subnetwork=jenkins-${CLUSTER_SUFFIX} --no-enable-autoupgrade --cluster-ipv4-cidr=/21 --labels delete-cluster-after-hours=6 --enable-ip-alias --workload-pool=cloud-dev-112233.svc.id.goog && \
                 kubectl create clusterrolebinding cluster-admin-binding --clusterrole cluster-admin --user jenkins@"$GCP_PROJECT".iam.gserviceaccount.com || ret_val=\$?
                 if [ \${ret_val} -eq 0 ]; then break; fi
                 ret_num=\$((ret_num + 1))