8.0 Migrate project-related modules

Migrate trivially the following modules to 8.0:
* account_analytic_project_id
* hr_contract_wage_type
* hr_timesheet_cost_contract
* project_code

The only signifiant change is to add a decimal precision on the float function field "hourly_wage" of "hr_contract_wage_type": If there is no decimal precision precised; the field will be automaticly rounded to two decimal after the comma.