Add test to verify no AAE repair after restart

Add a test to verify no Yokozuna AAE repair occurs after a cluster
restart. This is an issue I've seen in the past and figured adding a
test would be good.
Flush AAE trees during shutdown

Flush the AAE hashtrees during node shutdown.
Fix typo
Rename test function
Merge pull request #293 from basho/bugfix/rz/aae-flush

Add AAE flush + new test