Merge pull request #66 from codenotary/fix/heartbeat-timer

fix: initialize sessionHeartBeatTimer as daemon.

Author: ostafen

src/main/java/io/codenotary/immudb4j/ImmuClient.java

@@ -148,7 +148,7 @@ public synchronized void openSession(String database, String username, String pa
 
         session = new Session(resp.getSessionID(), database);
 
-        sessionHeartBeat = new Timer();
+        sessionHeartBeat = new Timer(true);
 
         sessionHeartBeat.schedule(new TimerTask() {
             @Override