Move EPP XML testdata to server/testdata

This will allow tests in server to reference the xml files.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=161582503

javatests/google/registry/tools/server/ToolsTestData.java

@@ -0,0 +1,44 @@
+// 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.server;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import com.google.common.io.ByteSource;
+import com.google.common.io.Resources;
+import java.io.IOException;
+import java.net.URL;
+
+/** Utility class providing easy access to contents of the {@code testdata/} directory. */
+public final class ToolsTestData {
+
+  /** Returns {@link ByteSource} for file in {@code tools/server/testdata/} directory. */
+  public static ByteSource get(String filename) {
+    return Resources.asByteSource(getUrl(filename));
+  }
+
+  /**
+   * Loads data from file in {@code tools/server/testdata/} as a String (assuming file is UTF-8).
+   *
+   * @throws IOException if the file couldn't be loaded from the jar.
+   */
+  public static String loadUtf8(String filename) throws IOException {
+    return Resources.asCharSource(getUrl(filename), UTF_8).read();
+  }
+
+  private static URL getUrl(String filename) {
+    return Resources.getResource(ToolsTestData.class, "testdata/" + filename);
+  }
+}