[FIX] web: increase timer for js tests
[FIX] web: increase timer for js tests

A few builds fail when run in 'primetime', because the js test suite
takes more than 120 seconds (on the slow runbots). With this commit, we
increase our timer to 180s to make sure that this does not happen again.

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo