cubicweb #3096585 [datafeed] broken sync: 'parser has no attribute http_timeout' in logs [validation pending]

the http_timeout attribut is added to the source but used from the parser...

priorityimportant
typebug
done in3.17.7
load0.100
load left0.000
closed by#5c6d6a9f4fc8 [datafeed] fix crash due to bad http_timeout handling. Closes #3096585
patch[datafeed] fix crash due to bad http_timeout handling. Closes #3096585 [applied]