[FIX] remove or convert old-API calls

addons/hr_timesheet/project_timesheet.py

addons/web/controllers/main.py

addons/web/models/ir_http.py

addons/web_diagram/controllers/main.py

addons/website_blog/controllers/main.py

openerp/addons/base/tests/test_api.py

openerp/addons/base/tests/test_user_has_group.py

openerp/addons/base/tests/test_views.py

openerp/fields.py

openerp/http.py

openerp/models.py

openerp/tests/common.py

openerp/tools/convert.py

openerp/tools/test_reports.py

openerp/tools/yaml_import.py

openerp/workflow/workitem.py