Batch copy feature should not copy hits value

Copied article should have 0 hits because this is a new article and nobody have seen it yet. 

Joomla Tracker Item (I've reported this bug for Joomla 3.3, but it present in Joomla 2.5 too):
http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=34025&start=0

PR for Joomla 3.3:
https://github.com/joomla/joomla-cms/pull/4050
Merge pull request #4067 from SergeyLitvinov/patch-4

[#34025] Batch copy feature should not copy hits value