[FIX] project: task stage access right issue
[FIX] project: task stage access right issue

Employees (base.group_user) can read tasks. However they miss the right to read
task stages (project.task.type). This causes issues when reading the form view
of a task. This commit fixes this issue.

bplancher/odoo,microcom/odoo,Elico-Corp/odoo_OCB,dfang/odoo,hip-odoo/odoo,sysadminmatmoz/OCB,ygol/odoo,ygol/odoo,storm-computers/odoo,dfang/odoo,Elico-Corp/odoo_OCB,hip-odoo/odoo,optima-ict/odoo,microcom/odoo,stephen144/odoo,bplancher/odoo,optima-ict/odoo,stephen144/odoo,bplancher/odoo,syci/OCB,ygol/odoo,ygol/odoo,laslabs/odoo,hip-odoo/odoo,ygol/odoo,Elico-Corp/odoo_OCB,dfang/odoo,bplancher/odoo,laslabs/odoo,dfang/odoo,storm-computers/odoo,ygol/odoo,storm-computers/odoo,syci/OCB,optima-ict/odoo,microcom/odoo,syci/OCB,bplancher/odoo,syci/OCB,optima-ict/odoo,syci/OCB,dfang/odoo,storm-computers/odoo,Elico-Corp/odoo_OCB,sysadminmatmoz/OCB,stephen144/odoo,hip-odoo/odoo,laslabs/odoo,Elico-Corp/odoo_OCB,laslabs/odoo,optima-ict/odoo,syci/OCB,dfang/odoo,microcom/odoo,storm-computers/odoo,stephen144/odoo,laslabs/odoo,storm-computers/odoo,hip-odoo/odoo,sysadminmatmoz/OCB,stephen144/odoo,sysadminmatmoz/OCB,Elico-Corp/odoo_OCB,microcom/odoo,sysadminmatmoz/OCB,sysadminmatmoz/OCB,bplancher/odoo,microcom/odoo,hip-odoo/odoo,optima-ict/odoo,ygol/odoo,laslabs/odoo,stephen144/odoo,sysadminmatmoz/OCB