Evict listings after approve/remove submission
Evict listings after approve/remove submission

When a submission is approved/removed the listings in the cache
are no longer accurate and have to be evicted. This fixes the
intermittent failings of test_approve & test_remove in tests.py

iAmMrinal0/reddit,13steinj/praw,darthkedrik/praw,TacticalGoat/reddit,gschizas/praw,praw-dev/praw,nmtake/praw,tehp/reddit,voussoir/reddit,tehp/reddit,voussoir/reddit,TacticalGoat/reddit,nmtake/praw,darthkedrik/praw,RGood/praw,gschizas/praw,tehp/reddit,iAmMrinal0/reddit,praw-dev/praw,RGood/praw,leviroth/praw,leviroth/praw,13steinj/praw