fix(environment): make KubeClient take multiple files

Rather than just taking a []byte for Install, take a map of
filenames->contents.

cmd/tiller/environment/environment.go

@@ -38,7 +38,13 @@ type ReleaseStorage interface {
 //
 // A KubeClient must be concurrency safe.
 type KubeClient interface {
-	Install(manifest []byte) error
+	// Install takes a map where the key is a "file name" (read: unique relational
+	// id) and the value is a Kubernetes manifest containing one or more resource
+	// definitions.
+	//
+	// TODO: Can these be in YAML or JSON, or must they be in one particular
+	// format?
+	Install(manifests map[string]string) error
 }
 
 // Environment provides the context for executing a client request.

cmd/tiller/environment/environment_test.go

@@ -30,7 +30,7 @@ func (r *mockReleaseStorage) Set(k string, v *hapi.Release) error {
 type mockKubeClient struct {
 }
 
-func (k *mockKubeClient) Install(manifest []byte) error {
+func (k *mockKubeClient) Install(manifests map[string]string) error {
 	return nil
 }
 
@@ -76,7 +76,9 @@ func TestKubeClient(t *testing.T) {
 	env := New()
 	env.KubeClient = kc
 
-	if err := env.KubeClient.Install([]byte("apiVersion: v1\n")); err != nil {
+	manifests := map[string]string{}
+
+	if err := env.KubeClient.Install(manifests); err != nil {
 		t.Errorf("Kubeclient failed: %s", err)
 	}
 }