[9.0] Port sale_start_end_dates and sale_rental#353

Merged

pedrobaeza merged 3 commits intoOCA:9.0from akretion:9-mig-sale-rental

Nov 8, 2016

+1,117-1,231

Commits on Oct 31, 2016

Port sale_start_end_dates and sale_rental to v9
alexis-via
committed

Commits on Nov 7, 2016

Auto-add to product variants group
alexis-via
committed

Commits on Nov 8, 2016

Use noupdate="1" instead of ="0" in data file
alexis-via
committed