Change "usergroups" commands to adapt to new `CommandsAPI`

sources/Users/ACommandUserGroups.uc

@@ -22,7 +22,6 @@ class ACommandUserGroups extends Command
 
 protected function BuildData(CommandDataBuilder builder)
 {
-    builder.Name(P("usergroups"));
     builder.Group(P("admin"));
     builder.Summary(P("User groups management."));
     builder.Describe(P("Allows to add/remove user groups and users to these: groups. Changes made"
@@ -77,7 +76,7 @@ protected function BuildData(CommandDataBuilder builder)
     builder.Describe(P("Allows to force usage of invalid user IDs."));
 }
 
-protected function Executed(CallData arguments, EPlayer instigator)
+protected function Executed(CallData arguments, EPlayer instigator, CommandPermissions permissions)
 {
     local bool      forceOption;
     local Text      groupName, userID, userName, annotation;
@@ -653,6 +652,6 @@ private function DisplayUsersFor(Text groupName)
     }
 }
 
-defaultproperties
+defaultproperties {
-{
+    preferredName = "usergroups"
 }