Add option --non_live_versions to set_num_instances command

This commit introduced a new flag to enable SetNumInstancesCommand to
be able to set the number of instances for all non-live versions for
a given service or for all deployed services.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=222826003

java/google/registry/tools/AppEngineAdminApiModule.java

@@ -0,0 +1,40 @@
+// Copyright 2018 The Nomulus 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.tools;
+
+import com.google.api.client.googleapis.extensions.appengine.auth.oauth2.AppIdentityCredential;
+import com.google.api.client.googleapis.util.Utils;
+import com.google.api.services.appengine.v1.Appengine;
+import dagger.Module;
+import dagger.Provides;
+import google.registry.config.CredentialModule.AppEngineAdminApiCredential;
+import google.registry.config.RegistryConfig.Config;
+import javax.inject.Singleton;
+
+/** Module providing the instance of {@link Appengine} to access App Engine Admin Api. */
+@Module
+public abstract class AppEngineAdminApiModule {
+
+  @Provides
+  @Singleton
+  public static Appengine provideAppengine(
+      @AppEngineAdminApiCredential AppIdentityCredential appIdentityCredential,
+      @Config("projectId") String projectId) {
+    return new Appengine.Builder(
+            Utils.getDefaultTransport(), Utils.getDefaultJsonFactory(), appIdentityCredential)
+        .setApplicationName(projectId)
+        .build();
+  }
+}