[FIX] expression: translated search as params are flatten, we need to expand "%s" placeholders when using the `in` operator
[MERGE] forward port of branch 7.0 up to revid 5269 chs@openerp.com-20140402112730-eoqxt0pu7lvcq5yg
[MERGE] forward port of branch saas-2 up to revid 5024 chs@openerp.com-20140402112825-ky8rcb3p467ikitc