be801ed80e
When installing requirements, the psycopg requirement can fail
because the $PATH does not contain the postgresql tools installed with
the .app.
This commit provides instructions to avoid this issue.
task-2922249
closes odoo/documentation#2506
X-original-commit: c40cf83073
Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>