Add "pubapi" App Engine service for check API, WHOIS, and RDAP

The migration plan is as follows:
1. This CL, which adds the new "pubapi" service that serves the check API, WHOIS, and RDAP.
2a. Update our public facing sites to switch over to use the new service.
2b. (either order) Rewrite the check API to remove dependencies on flows.
3. ... eventually, once the frontend service is no longer being hit by this traffic, remove its handling of these public endpoints.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=197716346

javatests/google/registry/module/pubapi/BUILD

@@ -0,0 +1,35 @@
+package(
+    default_testonly = 1,
+    default_visibility = ["//java/google/registry:registry_project"],
+)
+
+licenses(["notice"])  # Apache 2.0
+
+java_library(
+    name = "pubapi",
+    srcs = glob(["*.java"]),
+    resources = glob(["testdata/*"]),
+    runtime_deps = [
+        # TODO(b/19332643): Remove this dependency when Modules is lazy.
+        "@com_google_appengine_api_1_0_sdk//:testonly",
+    ],
+    deps = [
+        "//java/google/registry/module/pubapi",
+        "//java/google/registry/request",
+        "//javatests/google/registry/testing",
+        "@com_google_guava",
+        "@com_google_truth",
+        "@com_google_truth_extensions_truth_java8_extension",
+        "@javax_servlet_api",
+        "@junit",
+        "@org_mockito_all",
+    ],
+)
+
+load("//java/com/google/testing/builddefs:GenTestRules.bzl", "GenTestRules")
+
+GenTestRules(
+    name = "GeneratedTestRules",
+    test_files = glob(["*Test.java"]),
+    deps = [":pubapi"],
+)

javatests/google/registry/module/pubapi/PubApiRequestComponentTest.java

@@ -0,0 +1,33 @@
+// 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.module.pubapi;
+
+
+import google.registry.testing.GoldenFileTestHelper;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link PubApiRequestComponent}. */
+@RunWith(JUnit4.class)
+public class PubApiRequestComponentTest {
+
+  @Test
+  public void testRoutingMap() throws Exception {
+    GoldenFileTestHelper.assertThatRoutesFromComponent(PubApiRequestComponent.class)
+        .describedAs("pubapi routing map")
+        .isEqualToGolden(PubApiRequestComponentTest.class, "pubapi_routing.txt");
+  }
+}

javatests/google/registry/module/pubapi/PubApiServletTest.java

@@ -0,0 +1,47 @@
+// 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.module.pubapi;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import google.registry.testing.AppEngineRule;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+/** Unit tests for {@link PubApiServlet}. */
+@RunWith(JUnit4.class)
+public class PubApiServletTest {
+
+  @Rule
+  public final AppEngineRule appEngine =
+      AppEngineRule.builder().withDatastore().withLocalModules().build();
+
+  private final HttpServletRequest req = mock(HttpServletRequest.class);
+  private final HttpServletResponse rsp = mock(HttpServletResponse.class);
+
+  @Test
+  public void testService_unknownPath_returnNotFound() throws Exception {
+    when(req.getMethod()).thenReturn("GET");
+    when(req.getRequestURI()).thenReturn("/lol");
+    new PubApiServlet().service(req, rsp);
+    verify(rsp).sendError(404);
+  }
+}

javatests/google/registry/module/pubapi/testdata/pubapi_routing.txt

@@ -0,0 +1,13 @@
+PATH                 CLASS                      METHODS  OK AUTH_METHODS        MIN  USER_POLICY
+/_dr/whois           WhoisAction                POST     n  INTERNAL,API        APP  PUBLIC
+/check               CheckApiAction             GET      n  INTERNAL            NONE PUBLIC
+/rdap/autnum/(*)     RdapAutnumAction           GET,HEAD n  INTERNAL            NONE PUBLIC
+/rdap/domain/(*)     RdapDomainAction           GET,HEAD n  INTERNAL,API,LEGACY NONE PUBLIC
+/rdap/domains        RdapDomainSearchAction     GET,HEAD n  INTERNAL,API,LEGACY NONE PUBLIC
+/rdap/entities       RdapEntitySearchAction     GET,HEAD n  INTERNAL,API,LEGACY NONE PUBLIC
+/rdap/entity/(*)     RdapEntityAction           GET,HEAD n  INTERNAL,API,LEGACY NONE PUBLIC
+/rdap/help(*)        RdapHelpAction             GET,HEAD n  INTERNAL            NONE PUBLIC
+/rdap/ip/(*)         RdapIpAction               GET,HEAD n  INTERNAL            NONE PUBLIC
+/rdap/nameserver/(*) RdapNameserverAction       GET,HEAD n  INTERNAL            NONE PUBLIC
+/rdap/nameservers    RdapNameserverSearchAction GET,HEAD n  INTERNAL            NONE PUBLIC
+/whois/(*)           WhoisHttpAction            GET      n  INTERNAL            NONE PUBLIC