Merge "Add owner username to gerrit query command."

Documentation/json.txt

@@ -76,6 +76,8 @@ name:: User's full name, if configured.
 
 email:: User's preferred email address.
 
+username:: User's username, if configured.
+
 [[patchSet]]
 patchSet
 --------

gerrit-server/src/main/java/com/google/gerrit/server/events/AccountAttribute.java

@@ -17,4 +17,5 @@ package com.google.gerrit.server.events;
 public class AccountAttribute {
     public String name;
     public String email;
+    public String username;
 }

gerrit-server/src/main/java/com/google/gerrit/server/events/EventFactory.java

@@ -342,6 +342,7 @@ public class EventFactory {
     AccountAttribute who = new AccountAttribute();
     who.name = account.getFullName();
     who.email = account.getPreferredEmail();
+    who.username = account.getUserName();
     return who;
   }