Add direct members and directly included groups to GroupInfo

When listing groups it is now possible to request that the direct group
members and the directly included groups are included into the returned
GroupInfos. This is done by setting the options 'o=MEMBERS' and
'o=INCLUDES'.

In addition there is a new REST endpoint '/groups/<group-id>/detail' by
which a group with its direct members and directly included groups can
be retrieved.

This new endpoint is used to retrieve the group for populating the
AccountGroupMembersScreen. By this 2 requests are saved which would
otherwise be needed to fetch the direct group members and the directly
included groups.

Change-Id: Ib94e5c01cc0880aa508f703f4156ac7fe627d742
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

gerrit-server/src/main/java/com/google/gerrit/server/account/GetGroups.java

@@ -16,12 +16,14 @@ package com.google.gerrit.server.account;
 
 import com.google.common.collect.Lists;
 import com.google.gerrit.common.errors.NoSuchGroupException;
+import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
 import com.google.gerrit.extensions.restapi.RestReadView;
 import com.google.gerrit.reviewdb.client.Account;
 import com.google.gerrit.reviewdb.client.AccountGroup;
 import com.google.gerrit.server.IdentifiedUser;
 import com.google.gerrit.server.group.GroupJson;
 import com.google.gerrit.server.group.GroupJson.GroupInfo;
+import com.google.gwtorm.server.OrmException;
 import com.google.inject.Inject;
 
 import java.util.List;
@@ -37,7 +39,8 @@ public class GetGroups implements RestReadView<AccountResource> {
   }
 
   @Override
-  public List<GroupInfo> apply(AccountResource resource) {
+  public List<GroupInfo> apply(AccountResource resource)
+      throws ResourceNotFoundException, OrmException {
     IdentifiedUser user = resource.getUser();
     Account.Id userId = user.getAccountId();
     List<GroupInfo> groups = Lists.newArrayList();