swallows logstash redis connection errors and retries every 5 seconds

[calebTomlinson]

for https://github.com/nlf/bucker/issues/22

Of course, the fact that this is failing should be logged somewhere, but error logging inside of a logging library is somewhat problematic. It might be possible to log to self (thought that's not this here), and if the user has file logging or something else, then the error will get logged there.