fix: initialize sessionHeartBeatTimer as daemon.

Running the session heartbeat without setting it as a daemon will prolong
the application lifetime indefinitely unless closeSession() is called.

Signed-off-by: Stefano Scafiti <[email protected]>

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