update to redis 4.0.14
updating the redis-ha image to use redis version 4.0.14 Current version of redis is actually version 5, but version 4 is still the most widely deployed version. I've been running redis v4 for more than a year and it's has been completely stable the entire time. It's also provided some performance improvements over version 3
Signed-off-by: Sean Corkum <seancorkum@northwesternmutual.com