Import socket so we can use it to get name info

Previously this was using socket.getaddrinfo() without importing socket
and causing the daemon to fail. Running in the foreground did not use
statsd thus did not attempt to resolve the statsd host which is how this
got past manual testing. Import socket to get everything working agian.

Change-Id: I280973bdcdf472736a07d19173559b062ed74d3c

log_processor/client.py

@@ -23,6 +23,7 @@ import os
 import os.path
 import re
 import signal
+import socket
 import threading
 import time
 import yaml