[FIX] the cache key is sorted using, items keys, avoiding to compare items values
[FIX] the cache key is sorted using, items keys, avoiding to compare items values

vnc-biz/openerp-server,ovnicraft/openerp-server,gisce/openobject-server,xrg/openerp-server,MarkusTeufelberger/openobject-server,MarkusTeufelberger/openobject-server,gisce/openobject-server,ovnicraft/openerp-server,splbio/openobject-server,splbio/openobject-server,splbio/openobject-server,xrg/openerp-server,MarkusTeufelberger/openobject-server,vnc-biz/openerp-server,gisce/openobject-server