Add create_domain command to gtech_tool

Support creating domain with gtech_tool, instead of creating temporary epp file
and run execute_epp manually. Also changes CreateContactCommand for consistency.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=130127280

java/google/registry/tools/CreateDomainCommand.java

@@ -0,0 +1,99 @@
+// Copyright 2016 The Domain Registry 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;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Strings.isNullOrEmpty;
+
+import com.beust.jcommander.Parameter;
+import com.beust.jcommander.Parameters;
+import com.google.template.soy.data.SoyMapData;
+import google.registry.tools.Command.GtechCommand;
+import google.registry.tools.soy.CreateDomainSoyInfo;
+import java.util.List;
+import javax.inject.Inject;
+
+/** A command to create a new domain via EPP. */
+@Parameters(separators = " =", commandDescription = "Create a new domain via EPP.")
+final class CreateDomainCommand extends MutatingEppToolCommand implements GtechCommand {
+  @Parameter(names = {"-c", "--client"},
+      description = "Client identifier of the registrar to execute the command as",
+      required = true)
+  String clientIdentifier;
+
+  @Parameter(
+      names = "--domain",
+      description = "Domain name",
+      required = true)
+  private String domain;
+
+  @Parameter(
+      names = "--period",
+      description = "Initial registration period, in years.")
+  private Integer period;
+
+  @Parameter(
+      names = {"-n", "--nameservers"},
+      description = "List of nameservers, up to 13.",
+      variableArity = true)
+  private List<String> ns;
+
+  @Parameter(
+      names = {"-r", "--registrant"},
+      description = "Domain registrant.", 
+      required = true)
+  private String registrant;
+
+  @Parameter(
+      names = {"-a", "--admin"},
+      description = "Admin contact.",
+      required = true)
+  private String admin;
+
+  @Parameter(
+      names = {"-t", "--tech"},
+      description = "Technical contact.",
+      required = true)
+  private String tech;
+
+  @Parameter(
+      names = {"-p", "--password"},
+      description = "Password. Optional, randomly generated if not provided.")
+  private String password;
+
+  @Inject
+  PasswordGenerator passwordGenerator;
+
+  private static final int PASSWORD_LENGTH = 16;
+
+  @Override
+  protected void initMutatingEppToolCommand() {
+    if (isNullOrEmpty(password)) {
+      password = passwordGenerator.createPassword(PASSWORD_LENGTH);
+    }
+
+    checkArgument(ns == null || ns.size() <= 13, "There can be at most 13 nameservers.");
+
+    setSoyTemplate(CreateDomainSoyInfo.getInstance(), CreateDomainSoyInfo.CREATEDOMAIN);
+    addSoyRecord(clientIdentifier, new SoyMapData(
+        "domain", domain,
+        "period", period == null ? null : period.toString(),
+        "ns", ns,
+        "registrant", registrant,
+        "admin", admin,
+        "tech", tech,
+        "password", password));
+  }
+}