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.

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

java/google/registry/reporting/icann/BasicDnsCountQueryCoordinator.java

@@ -0,0 +1,38 @@
+// 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 com.google.common.io.Resources;
+import google.registry.util.ResourceUtils;
+import google.registry.util.SqlTemplate;
+
+/**
+ * DNS Count query for the basic case.
+ */
+public class BasicDnsCountQueryCoordinator implements DnsCountQueryCoordinator {
+
+  BasicDnsCountQueryCoordinator(DnsCountQueryCoordinator.Params params) {}
+
+  @Override
+  public String createQuery() {
+    return SqlTemplate.create(
+            ResourceUtils.readResourceUtf8(
+                Resources.getResource(this.getClass(), "sql/" + "dns_counts.sql")))
+        .build();
+  }
+
+  @Override
+  public void prepareForQuery() throws Exception {}
+}