Delay installation of skins after installation of paths, because some Z SQL Methods in skins can use connections installed as path.
Z SQL Method can use any kind of Shared.DC.ZRDB.Connection.Connection, not only MySQL Database Connection.
Move code to check and update Z SQL Method connection_id in a function.



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@10142 20353a03-c40f-0410-a6d1-a30d3c3de9de