(insert-before and insert-after).
This patch will avoid reading the last object of xpath expression.

"/erp5/object[@gid='1']/object[@id='2']/object[@id='default_career']" 
will become similar as 
"/erp5/object[@gid='1']/object[@id='2']"



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@36877 20353a03-c40f-0410-a6d1-a30d3c3de9de