Add Dataflow path to generate overall monthly invoice

This forks off the results of the billing_events query from Bigquery and generates the overall invoice for the month.

This also turns the ad hoc beam binary into a proper Nomulus command, allowing us to @Inject from the RegsistryToolComponent and thus template the BillingEvent Bigquery query.

Next steps:
- Add the beam package to the open source build
  - That will likely require updates to the open source jars, since I'm using features from 2.2.0 which was only just released.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=178798943

java/google/registry/tools/DeployInvoicingPipelineCommand.java

@@ -0,0 +1,31 @@
+// Copyright 2017 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.beust.jcommander.Parameters;
+import google.registry.beam.InvoicingPipeline;
+import javax.inject.Inject;
+
+/** Nomulus command that deploys the {@link google.registry.beam.InvoicingPipeline} template. */
+@Parameters(commandDescription = "Deploy the invoicing pipeline to GCS.")
+public class DeployInvoicingPipelineCommand implements Command {
+
+  @Inject InvoicingPipeline invoicingPipeline;
+
+  @Override
+  public void run() throws Exception {
+    invoicingPipeline.deploy();
+  }
+}