yaml: use selected user and not admin for onchange

Fixes: #1885
yaml: use selected user and not admin for defaults
[FIX] project: don't use planned_hours in project gantt

The gantt view does not have enough data to properly display a project's length
based on only the planned hours.
It also makes it impossible to change the project's length using drag & drop.
It's safer to simply display the start and end dates recorded in the project
Fixes #2632
[REF] Packaging: Backport of v8 packaging

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[FIX] sql_db: close db connexions before removing them.

Closes #831 aka lp 1322191
[FIX] event onchange event type

Courtesy of Alejandro Santana

Closes: #1046, #1047
Merge pull request #1886 from lepistone/7.0-fix-yaml-onchange-user

use selected user and not admin to run yaml tests
[FIX] point_of_sale: pos details report company taxes and payments

If the sales details only fetches the pos sales details of his own company, it should be the case for the pos payments and taxes as well.
[FIX] l10n_ro: changed module author as requested in issue 621105
[FIX] tools: disable useless entity resolver in XML parser
[FIX] tools: add test for some dynamic expressions