Unreachable feed list causes the feed queue to error and not recover

[c3ho]

What happened:
https://wiki.cdot.senecacollege.ca/wiki/Planet_CDOT_Feed_List was down last night and being unable to fetch the feeds from wiki caused feed queue to error and never recover from the error.

What should have happened:
Feed queue should be able to recover from the error, and once the feeds were available again add them to the queue.

How to reproduce it (as precise as possible):
make the feed list unreachable and run npm start, make the feed list reachable then observe results

Anything else we need to know?:

Environment:

• OS: Windows 10
• Browser: Chrome