SerialBoardsLister now waits indefinitely before starting. BaseNoGui.packages

will eventually be set to at least an empty HashMap, even if no hardware is
present. Fixes #3311

Author: Federico Fissore

Diff for: arduino-core/src/cc/arduino/packages/discoverers/serial/SerialBoardsLister.java

@@ -41,8 +41,6 @@
 
 public class SerialBoardsLister extends TimerTask {
 
-  private static final int MAX_TIME_AWAITING_FOR_PACKAGES = 5000;
-
   private final SerialDiscovery serialDiscovery;
 
   public SerialBoardsLister(SerialDiscovery serialDiscovery) {
@@ -55,13 +53,11 @@ public void start(Timer timer) {
 
   @Override
   public void run() {
-    int sleptFor = 0;
-    while (BaseNoGui.packages == null && sleptFor <= MAX_TIME_AWAITING_FOR_PACKAGES) {
+    while (BaseNoGui.packages == null) {
       try {
         Thread.sleep(1000);
-        sleptFor += 1000;
       } catch (InterruptedException e) {
-        e.printStackTrace();
+        // noop
       }
     }