cubicweb #10928592 DataFeedXMLParser still commit in its process() method [validation pending]

which it must NOT, otherwise one cannot handle (at least) deletion of entities having composite relations...

prioritynormal
typebug
done in3.22.2
load0.250
load left0.000
closed by#ddd5dbf52b72 [datafeed] do NOT call commit in DataFeedXMLParser.process() (closes #10928592)
patch[datafeed] do NOT call commit in DataFeedXMLParser.process() (closes #10928592) [applied]