[MERGE] P3: semantics fixes

addons/account/models/account_analytic_line.py

addons/account/models/account_invoice.py

addons/account/models/account_move.py

addons/account/report/account_partner_ledger.py

addons/crm/models/crm_lead.py

addons/mail/controllers/main.py

addons/membership/models/account_invoice.py

addons/purchase/models/account_invoice.py

addons/resource/models/resource.py

addons/resource/models/resource_mixin.py

addons/stock_account/models/account_invoice.py

addons/survey/tests/test_survey.py

addons/web_editor/models/ir_qweb.py

addons/website_blog/models/website_blog.py

addons/website_customer/controllers/main.py

addons/website_event_track/controllers/main.py

addons/website_event_track/views/event_track_templates.xml

addons/website_forum/controllers/main.py

addons/website_sale/controllers/main.py

odoo/addons/base/ir/ir_http.py