[ADD] safe_eval: UNPACK_SEQUENCE and Exception

Allowing UNPACK_SEQUENCE allows the use of the "multi" assignation:
a, b = [1,2]
for a,b in items
[FIX] hr_holidays: do not allow reduce remaining leaves

In the Employee form, a remaining legal leaves field is available, which shows remaining validated leaves from allocation requests
As this is not allowed to delete a validated allocation requets, it shouldn't be possible to reduce the validated remaining leaves of an employee.
To reduce the remaining leaves of an employee, the user should cancel and remove the allocation request
[FIX] translate: Fix debug print when parse path list to translate.
[FIX] account: no journal items on consolidation accounts

As for the view accounts, the consolidation accounts should not allow to create journal items.
Fixes #1090
Revert 3dec090 "[FIX] ir_values: fallback when no condition"

An ir.value without condition should not match when searching with a condition.
When a field with change_default on it is modified, the method get_defaults is called with the new value. This means that manually modifying a field with this trigger would put back the default value (opw 611193).
[IMP] base_vat: differenciate VIES and classical VAT error

Display a different error message so that users are aware if the test failed with VIES enabled or not (opw 609823)
[FIX] web: on refresh, do search_read with fields passed
Merge pull request #1391 from savoirfairelinux/7.0-translate-trans_generate_debug_print

[FIX] translate: Fix debug print when parse path list to translate.
[FIX] mail: reset of default_type in context

When creating a new message, we need to reset the default_type key to avoid context propagation (e.g. invoice menu).
However we used to compare the key in context (char) with the list of selections (tuple) so it was never matching and always reset.
[FIX] stock: partial deliveries switch on delivered picking

Users don't care for the backorder picking precisely because they can't process it, whereas they may have to do some more things on the picking they processed: invoice it, print delivery orders or transportation stickers..
Refresh the browse record after changing the name to avoid the need to rebrowse.
Fixes #1372