SD-514 : Ingest package don't fetch subitems and on ingest preview an error is showed

Fixed fetch package ingest issue, added behave test for fetch ingest
package and for archive pakage ingest, changed json_match to support
partial matching on lists added mock data for reuters provider
Deletes redis keys when main task is done. Sometimes(especially on package items) the main task is reported done but other subtasks are not done yet so added condition to check if all subtasks are done.