max connection lifetime of 5 minutes, make sure we cycle the connections

Author: BrandonArp

src/main/java/com/arpnetworking/tsdcore/sinks/HttpPostSink.java

@@ -195,7 +195,8 @@ protected HttpPostSink(final Builder<?, ?> builder) {
 
     static {
         final DefaultAsyncHttpClientConfig.Builder clientConfigBuilder = new DefaultAsyncHttpClientConfig.Builder();
-        clientConfigBuilder.setThreadPoolName("HttpPostSinkWorker");
+        clientConfigBuilder.setThreadPoolName("HttpPostSinkWorker")
+                .setConnectionTtl(300000);
         final AsyncHttpClientConfig clientConfig = clientConfigBuilder.build();
         CLIENT = new DefaultAsyncHttpClient(clientConfig);
     }