Update _related property so Phalcon avoids to make a lazy loading

When using relationships lazy loading along with magic "getPropertyName" methods the relationships are lazy loaded without having the eager load in consideration. This patch fix it.

References: stibiumz/phalcon.eager-loading#12

Library/Phalcon/Mvc/Model/EagerLoading/EagerLoad.php

@@ -163,6 +163,7 @@ public function load()
                     if (static::$isPhalcon2) {
                         $record->{$alias} = null;
                         $record->{$alias} = $referencedModels;
+                        $record->_related[$alias] = $referenceModels;
                     }
                 } else {
                     $record->{$alias} = null;