Resolve #3541890 "Entity validation should"
Closes #3541890.
Updated switchAccount method in FeedsExecutable.php to switch to owner of the imported items.
To test:
- create or edit a Feed so that it is owned by a user with no admin roles
- pick a feed type set up to have a user with admin rights to own the content that’s imported
- after confirming there is new content to be imported, run cron on the site
- observe nothing is imported, “failed to validate” errors abound
- switch to this dev branch
- run cron
- observe content is imported without errors.