[IMP] Cancelling of procurements related to purchase orders should check state/UoM of the purchase order line + optim action_cancel

[IMP] Add tests

[IMP] Clean up
Merge branch '8.0-wmspurchaseproccanceloptim-jco' of github.com:odoo-dev/odoo; branch '8.0' of github.com:odoo/odoo into 8.0
[IMP] Cancelling of procurements related to purchase orders should check state/UoM of the purchase order line + optim action_cancel

[IMP] Add tests

[IMP] Clean up
Merge branch '8.0' of github.com:odoo/odoo into 8.0
[IMP] No lot in qty update as it is only confusing #3984
[MERGE] purchase: speed up cancelling procurements, add test, hide lot in quick inventory update

Manual re-merge of following commits, to fix mainline history:
  3ea978bc115f1121f841be6ec5d50b224579b497
  f76d714fb9940c258955d207d1601732fd23d7d3
  c12f4efc539e2be6e1b1c5338a4240419e500177
[FIX] (portal_)project_issue: remove duplicated field

Field priority in kanban view was present twice which made inheritance harder
[ADD] Packaging: also publish source dist .zip file
[ADD] Packaging: Debian and CentOS Dockerfiles for nightly builds tests

This way we'll be using docker cache to spare dependencies download time.
[FIX] website_blog: fi xbanner in demo data
[FIX] stock: when putting product in pack from barcode interface, should return package_id instead of True
[FIX] web: scroll handling for many2one selection

If the many2one selection height was too big (bigger than the browser page), it wasn't possible to see all options, because the body is set as overflow: hidden;

Moreover, if you opened a many2one selection and then scrolled the page, the selection moved with the scrolling, while it should be sticked to its input field
[IMP] models.py: increase logging level for columns that can't be casted automatically when upgrading a module.
[FIX] account_analytic_analysis: default pricelist for contract sales order

With 'Fixed Price' enabled, a button giving the possibility to list all sale orders appears.
When browsing the list, there the possibility to create a new sale order.
The contract pricelist should be used by default when coming from this specific button.
[FIX] google_calendar: recurrent event syncrhonization

When an attendee is added exceptionnally in an instance of a recurrent event, do not try to sync the basic recurrent event in his calendar
[FIX] google_calendar: deleted excluded recurring event

Do not try to delete an excluded recurrent event added in Google, but not yet syncrhonised in Odoo (immediately deleted for instance)
[FIX] product: pricelist: multiple corrections in UoM-related conversions

Pricelist computations need to consider 2 different Units
of Measure:
 - The default product UoM (product.uom_id), used as reference
   for the various quantities and amounts specified in each
   pricelist rules.
 - The `context UoM` is the UoM in which the result is requested,
   that is the list price UoM.

For example the 'price_min_margin' amount is meant for the unit
price of 1 x default UoM. When the context UoM is not the default
product UoM, it can be any UoM of the same UoM Category, and the
various quantities and amounts specified on the rule need to
be adapted accordingly:
  - min_quantity (expressed in terms of the default UoM)
  - price_surcharge (specified for 1 x default UoM)
  - price_min_margin (specified for 1 x default UoM)
  - price_max_margin (specified for 1 x default UoM)

The UoM corrections were not done consistently and resulted in
wrong prices when computing the price using a non-default UoM.
The cases were a conversion was needed or not were not properly
identified within the _price_rule_get_multi().

After this commit, the various code branches in _price_rule_get_multi
always ensures that:
 - price requested for: `qty` of `qty_uom_id`
 - `qty_in_product_uom` is the requested `qty` converted to default UoM
 - current (intermediary) price: `price` for  `price_uom_id`

Therefore `price` and `price_uom_id` are always in sync, and `price_uom_id`
can always be compared with `qty_uom_id' in order to know whether
a conversion is still needed.

This patch also corrects and extends the regression tests
introduced at revision 79ebe10.
[IMP] hr_recruitment: set company_id on change department
[IMP] base: show "mode" in ir.ui.view form view