first spike at a CI bdd tests against GKE

Jenkinsfile

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+pipeline {
+    environment {
+        GH_CREDS = credentials('jenkins-x-github')
+        GKE_SA = credentials('gke-sa')
+    }
+    agent {
+        label "jenkins-jx-base"
+    }
+    stages {
+        stage('CI Build') {
+            when {
+                branch 'PR-*'
+            }
+            environment {
+                CLUSTER_NAME = "JXCE-$BRANCH_NAME"
+                ZONE = "europe-west1-b"
+                PROJECT_ID = "jenkinsx-dev"
+                SERVICE_ACCOUNT_FILE = "$GKE_SA"
+            }
+            steps {
+                container('jx-base') {
+                    sh "./jx/scripts/ci-gke.sh"
+                }
+            }
+        }
+
+        stage('Build and Push Release') {
+            when {
+                branch 'master'
+            }
+            steps {
+                // auto upgrade demo env
+                echo 'auto upgrades not yet implemented'
+            }
+        }
+    }
+}

jx/scripts/ci-gke.sh

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+#!/usr/bin/env bash
+set -e
+set -x
+
+gcloud auth activate-service-account --key-file $SERVICE_ACCOUNT_FILE
+
+jx create cluster gke -n ${CLUSTER_NAME,,} \
+    --skip-login=true \
+    --batch-mode \
+    --project-id ${PROJECT_ID} \
+    --zone ${ZONE} \
+    --machine-type n1-standard-2 \
+    --num-nodes 2 \
+    --git-username $GH_CREDS_USR \
+    --git-api-token $GH_CREDS_PSW \
+    --git-provider-url github.com

jx/scripts/release.sh

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+#!/usr/bin/env bash
+