TestAccount: rename getEmailAddress() to getNameEmail()

The getEmailAddress() returns "name <login@host>" while an email
address is often interpreted as "login@host"

Change-Id: Icf4d825d1618dea547f546d83af724bfe210da9d

java/com/google/gerrit/mail/Address.java

@@ -16,6 +16,7 @@ package com.google.gerrit.mail;
 
 import com.google.gerrit.common.Nullable;
 
+/** Represents an address (name + email) in an email message. */
 public class Address {
   public static Address parse(String in) {
     final int lt = in.indexOf('<');