Only load Helper::ResultSet::SetOperations instead of all

DBIx::Class::Helpers which saves ram and prevents those unneeded
Helpers to introduce a bug in certain versions, when we did
$resultset->getColumn(*)->all

lib/NGCP/Schema/ResultSet.pm

@@ -4,4 +4,5 @@ extends 'DBIx::Class::ResultSet';
 
 our $VERSION = '2.006';
 
-__PACKAGE__->load_components('Helper::ResultSet');
+__PACKAGE__->load_components('Helper::ResultSet::SetOperations');
+