Add initial implementation of YAML config file

This implements the basic framework that allows global YAML
configuration, per-environment custom configuration, and unit-
test-specific configuration.

TESTED=I deployed to alpha, ran some EPP commands through the
nomulus tool, and verified no errors.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=145422680

java/google/registry/config/RegistryConfigSettings.java

@@ -0,0 +1,49 @@
+// Copyright 2016 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.config;
+
+/** The POJO that YAML config files are deserialized into. */
+public class RegistryConfigSettings {
+
+  public General general;
+
+  public Datastore datastore;
+
+  public Monitoring monitoring;
+
+  /** General configuration options that apply to the entire App Engine project. */
+  public static class General {
+
+    public String appEngineProjectId;
+  }
+
+  /** Configuration for Cloud Datastore. */
+  public static class Datastore {
+
+    public int commitLogBucketsNum;
+
+    public int eppResourceIndexBucketsNum;
+  }
+
+  /** Configuration for monitoring. */
+  public static class Monitoring {
+
+    public int stackdriverMaxQps;
+
+    public int stackdriverMaxPointsPerRequest;
+
+    public int writeIntervalSeconds;
+  }
+}