Start Pool before starting threads for cron and worker

issue10704
review346881064
(grafted from 659db305fa55228d27a6e1defb205cdf0c3aaef3)

--HG--
branch : 6.0

bin/trytond-cron

@@ -18,7 +18,9 @@ config.update_etc(options.configfile)
 commandline.config_log(options)
 
 # Import after application is configured
+from trytond.pool import Pool
 import trytond.cron as cron
 
 with commandline.pidfile(options):
+    Pool.start()
     cron.run(options)

bin/trytond-worker

@@ -18,7 +18,9 @@ config.update_etc(options.configfile)
 commandline.config_log(options)
 
 # Import after application is configured
+from trytond.pool import Pool
 import trytond.worker as worker
 
 with commandline.pidfile(options):
+    Pool.start()
     worker.work(options)