Fixed expiry.php with 0 byte when expiring AllViewCache many times.

Fixed expiry.php with 0 byte when expiring AllViewCache many times.

Also optimized expireAllViewCache - eZContentCacheManager::nodeList will be
 invoked only once when moving many nodes with some complicated relations.

Test: In moving 50 nodes from admin interface, it will invoke eZContentCacheManager::nodeList only once taking 2 seconds instead of 50 times(in my test it was 71) taking 30 seconds in "Node cleanup list".

Ref methods:
eZContentObjectTreeNode::clearViewCacheForSubtree
eZContentObject::fixReverseRelations