Adding kustomization files for remote bases

Closes #2391

Adds support to allow kustomize users to point to a [remote
base](https://github.com/kubernetes-sigs/kustomize/blob/master/examples/remoteBuild.md) of the prometheus-operator and kube-prometheus. Now that kustomize is a part of kubectl, this is provides a very simple way of installing prometheus-operator and kube-prometheus with no additional tools besides kubectl.

* [Added] kustomization.yaml: hardcoded kustomization base for prometheus-operator
bundle.yaml
* [Added] kustomization generation from kube-prometheus example jsonnet

example.jsonnet

@@ -5,11 +5,28 @@ local kp =
     },
   };
 
-{ ['00namespace-' + name]: kp.kubePrometheus[name] for name in std.objectFields(kp.kubePrometheus) } +
-{ ['0prometheus-operator-' + name]: kp.prometheusOperator[name] for name in std.objectFields(kp.prometheusOperator) } +
-{ ['node-exporter-' + name]: kp.nodeExporter[name] for name in std.objectFields(kp.nodeExporter) } +
-{ ['kube-state-metrics-' + name]: kp.kubeStateMetrics[name] for name in std.objectFields(kp.kubeStateMetrics) } +
-{ ['alertmanager-' + name]: kp.alertmanager[name] for name in std.objectFields(kp.alertmanager) } +
-{ ['prometheus-' + name]: kp.prometheus[name] for name in std.objectFields(kp.prometheus) } +
-{ ['prometheus-adapter-' + name]: kp.prometheusAdapter[name] for name in std.objectFields(kp.prometheusAdapter) } +
-{ ['grafana-' + name]: kp.grafana[name] for name in std.objectFields(kp.grafana) }
+local kustomization = {
+  apiVersion: 'kustomize.config.k8s.io/v1beta1',
+  kind: 'Kustomization',
+  resources:
+    ['00namespace-' + name + '.yaml' for name in std.objectFields(kp.kubePrometheus)] +
+    ['0prometheus-operator-' + name + '.yaml' for name in std.objectFields(kp.prometheusOperator)] +
+    ['node-exporter-' + name + '.yaml' for name in std.objectFields(kp.nodeExporter)] +
+    ['kube-state-metrics-' + name + '.yaml' for name in std.objectFields(kp.kubeStateMetrics)] +
+    ['alertmanager-' + name + '.yaml' for name in std.objectFields(kp.alertmanager)] +
+    ['prometheus-' + name + '.yaml' for name in std.objectFields(kp.prometheus)] +
+    ['prometheus-adapter-' + name + '.yaml' for name in std.objectFields(kp.prometheusAdapter)] +
+    ['grafana-' + name + '.yaml' for name in std.objectFields(kp.grafana)],
+};
+
+local manifests =
+  { ['00namespace-' + name]: kp.kubePrometheus[name] for name in std.objectFields(kp.kubePrometheus) } +
+  { ['0prometheus-operator-' + name]: kp.prometheusOperator[name] for name in std.objectFields(kp.prometheusOperator) } +
+  { ['node-exporter-' + name]: kp.nodeExporter[name] for name in std.objectFields(kp.nodeExporter) } +
+  { ['kube-state-metrics-' + name]: kp.kubeStateMetrics[name] for name in std.objectFields(kp.kubeStateMetrics) } +
+  { ['alertmanager-' + name]: kp.alertmanager[name] for name in std.objectFields(kp.alertmanager) } +
+  { ['prometheus-' + name]: kp.prometheus[name] for name in std.objectFields(kp.prometheus) } +
+  { ['prometheus-adapter-' + name]: kp.prometheusAdapter[name] for name in std.objectFields(kp.prometheusAdapter) } +
+  { ['grafana-' + name]: kp.grafana[name] for name in std.objectFields(kp.grafana) };
+
+manifests { kustomization: kustomization }

manifests/kustomization.yaml

+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+- 00namespace-namespace.yaml
+- 0prometheus-operator-0alertmanagerCustomResourceDefinition.yaml
+- 0prometheus-operator-0prometheusCustomResourceDefinition.yaml
+- 0prometheus-operator-0prometheusruleCustomResourceDefinition.yaml
+- 0prometheus-operator-0servicemonitorCustomResourceDefinition.yaml
+- 0prometheus-operator-clusterRole.yaml
+- 0prometheus-operator-clusterRoleBinding.yaml
+- 0prometheus-operator-deployment.yaml
+- 0prometheus-operator-service.yaml
+- 0prometheus-operator-serviceAccount.yaml
+- 0prometheus-operator-serviceMonitor.yaml
+- node-exporter-clusterRole.yaml
+- node-exporter-clusterRoleBinding.yaml
+- node-exporter-daemonset.yaml
+- node-exporter-service.yaml
+- node-exporter-serviceAccount.yaml
+- node-exporter-serviceMonitor.yaml
+- kube-state-metrics-clusterRole.yaml
+- kube-state-metrics-clusterRoleBinding.yaml
+- kube-state-metrics-deployment.yaml
+- kube-state-metrics-role.yaml
+- kube-state-metrics-roleBinding.yaml
+- kube-state-metrics-service.yaml
+- kube-state-metrics-serviceAccount.yaml
+- kube-state-metrics-serviceMonitor.yaml
+- alertmanager-alertmanager.yaml
+- alertmanager-secret.yaml
+- alertmanager-service.yaml
+- alertmanager-serviceAccount.yaml
+- alertmanager-serviceMonitor.yaml
+- prometheus-clusterRole.yaml
+- prometheus-clusterRoleBinding.yaml
+- prometheus-prometheus.yaml
+- prometheus-roleBindingConfig.yaml
+- prometheus-roleBindingSpecificNamespaces.yaml
+- prometheus-roleConfig.yaml
+- prometheus-roleSpecificNamespaces.yaml
+- prometheus-rules.yaml
+- prometheus-service.yaml
+- prometheus-serviceAccount.yaml
+- prometheus-serviceMonitor.yaml
+- prometheus-serviceMonitorApiserver.yaml
+- prometheus-serviceMonitorCoreDNS.yaml
+- prometheus-serviceMonitorKubeControllerManager.yaml
+- prometheus-serviceMonitorKubeScheduler.yaml
+- prometheus-serviceMonitorKubelet.yaml
+- prometheus-adapter-apiService.yaml
+- prometheus-adapter-clusterRole.yaml
+- prometheus-adapter-clusterRoleBinding.yaml
+- prometheus-adapter-clusterRoleBindingDelegator.yaml
+- prometheus-adapter-clusterRoleServerResources.yaml
+- prometheus-adapter-configMap.yaml
+- prometheus-adapter-deployment.yaml
+- prometheus-adapter-roleBindingAuthReader.yaml
+- prometheus-adapter-service.yaml
+- prometheus-adapter-serviceAccount.yaml
+- grafana-dashboardDatasources.yaml
+- grafana-dashboardDefinitions.yaml
+- grafana-dashboardSources.yaml
+- grafana-deployment.yaml
+- grafana-service.yaml
+- grafana-serviceAccount.yaml
+- grafana-serviceMonitor.yaml