Create Stackdriver module and inject it into backend module

This adds Stackdriver as a DI module into the registry codebase. This is a
necessary prerequisite for using Stackdriver based monitoring. For now, I'm
only adding it to the backend module as it will be more work to add it to the
frontend module.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=126730925

java/google/registry/monitoring/whitebox/BUILD

@@ -10,6 +10,9 @@ java_library(
     srcs = glob(["*.java"]),
     deps = [
         "//apiserving/discoverydata/bigquery:bigqueryv2",
+        "//google/monitoring:monitoring_java_lib",
+        "//java/com/google/api/client/http",
+        "//java/com/google/api/client/json",
         "//java/com/google/api/client/util",
         "//java/com/google/common/annotations",
         "//java/com/google/common/base",

java/google/registry/monitoring/whitebox/StackdriverModule.java

@@ -0,0 +1,54 @@
+// Copyright 2016 The Domain Registry 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 google.registry.monitoring.whitebox;
+
+import com.google.api.client.http.HttpRequestInitializer;
+import com.google.api.client.http.HttpTransport;
+import com.google.api.client.json.JsonFactory;
+import com.google.api.services.monitoring.v3.Monitoring;
+import com.google.api.services.monitoring.v3.MonitoringScopes;
+
+import dagger.Module;
+import dagger.Provides;
+import dagger.multibindings.ElementsIntoSet;
+
+import google.registry.config.ConfigModule.Config;
+import google.registry.request.OAuthScopes;
+
+import java.util.Set;
+
+/** Dagger module for Google Stackdriver service connection objects. */
+@Module
+public final class StackdriverModule {
+
+  /** Provides OAuth2 scopes for the Stackdriver service needed by Domain Registry. */
+  @Provides
+  @ElementsIntoSet
+  @OAuthScopes
+  static Set<String> provideStackdriverOAuthScopes() {
+    return MonitoringScopes.all();
+  }
+
+  @Provides
+  static Monitoring provideMonitoring(
+      HttpTransport transport,
+      JsonFactory jsonFactory,
+      HttpRequestInitializer httpRequestInitializer,
+      @Config("projectId") String projectId) {
+    return new Monitoring.Builder(transport, jsonFactory, httpRequestInitializer)
+        .setApplicationName(projectId)
+        .build();
+  }
+}