[IMP] server: intercept SIGXCPU and shutdown gracefully
[IMP] server: intercept SIGXCPU and shutdown gracefully

When the runbot spawns an Odoo instance, a CPU TIME limit is set.
When this limit is reached, the kernel kills the Odoo instance and no
message appears in the logs leaving the dev in a deep smoke cloud.

With this commit, the signal sent by the kernel when the soft
limit is reached (SIGXCPU), is intercepeted and Odoo shutdown gracefully with a
nice message for the dev.

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