[imp] changed meaning of operation 3 on o2m to behave like operation 5
[imp] changed meaning of operation 3 on o2m to behave like operation 5

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