Isolate customizable code in activity reporting

Modularize the code for DNS count reporting to allow it to be customized for
more flexible systems.
Tested:
  Uploaded to alpha with hacks to allow admin initiating and logging from the
  DnsCountQueryCoordinatorModule, verified that the provider function is invoked and
  that the action runs successfully.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=225225587

java/google/registry/reporting/icann/DnsCountQueryCoordinatorModule.java

@@ -0,0 +1,42 @@
+// 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.reporting.icann;
+
+import static google.registry.util.TypeUtils.getClassFromString;
+import static google.registry.util.TypeUtils.instantiate;
+
+import dagger.Module;
+import dagger.Provides;
+import google.registry.bigquery.BigqueryConnection;
+import google.registry.config.RegistryConfig.Config;
+import org.joda.time.YearMonth;
+
+/** Dagger module to provide the DnsCountQueryCoordinator. */
+@Module
+public class DnsCountQueryCoordinatorModule {
+
+  @Provides
+  static DnsCountQueryCoordinator provideDnsCountQueryCoordinator(
+      @Config("dnsCountQueryCoordinatorClass") String customClass,
+      BigqueryConnection bigquery,
+      YearMonth yearMonth,
+      @Config("projectId") String projectId) {
+    DnsCountQueryCoordinator.Params params =
+        new DnsCountQueryCoordinator.Params(bigquery, yearMonth, projectId);
+    DnsCountQueryCoordinator result =
+        instantiate(getClassFromString(customClass, DnsCountQueryCoordinator.class), params);
+    return result;
+  }
+}