* move and merge function category to erp5_core.bt5

* move and merge financial_section category to erp5_accounting.bt5
* delete source_function and destination_function (they are duplicate with the ones in erp5_core.bt5)
* move z_related_financial_section_category, z_related_function_category and z_related_group_category catalog methods to erp5_accounting.bt5
* move groupCategory, financialSectionCategory and functionCategory related keys to erp5_accounting.bt5


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@4045 20353a03-c40f-0410-a6d1-a30d3c3de9de