[IMP] read_group: pass superuser uid to group_by_full methods to avoid access right issues
[IMP] read_group: pass superuser uid to group_by_full methods to avoid access right issues

This helps avoid access right issues in restricted
contexts, such as embedded web client, or shared
access (via portal or share wizard).
gisce/openobject-server,vnc-biz/openerp-server,MarkusTeufelberger/openobject-server,MarkusTeufelberger/openobject-server,splbio/openobject-server,ovnicraft/openerp-server,gisce/openobject-server,splbio/openobject-server,vnc-biz/openerp-server,ovnicraft/openerp-server,splbio/openobject-server,gisce/openobject-server,MarkusTeufelberger/openobject-server