Separate out the master's control loops

These are "Bootstrap Controllers" as distinct from
the controllers in the controller-manager binary - they
are necessary for the cluster to start running.

test/integration/openshift_test.go

@@ -0,0 +1,35 @@
+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package integration
+
+import (
+	"testing"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/master"
+)
+
+// This test references methods that OpenShift uses to customize the master on startup, that
+// are not referenced directly by a master.
+func TestMasterExportsSymbols(t *testing.T) {
+	_ = &master.Config{
+		EnableCoreControllers: false,
+		EnableUISupport:       false,
+		EnableSwaggerSupport:  false,
+		RestfulContainer:      nil,
+	}
+	_ = (&master.Master{}).NewBootstrapController()
+}