[FIX] server.py: don't start multiple FSWatcher in multiworker mode
[FIX] server.py: don't start multiple FSWatcher in multiworker mode

Before this commit every worker would start his own FSWatcher.
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo