Added a delai for the task initialization

Signed-off-by: Emmanuel Bigeon <emmanuel@bigeon.fr>

gclc-process/src/test/java/net/bigeon/gclc/process/ForkTaskTest.java

@@ -46,6 +46,12 @@ public class ForkTaskTest {
 
         final Thread execThread = new Thread(task);
         execThread.start();
+        try {
+            execThread.join(100);
+        } catch (final InterruptedException e) {
+            // TODO Auto-generated catch block
+            e.printStackTrace();
+        }
 
         try (PipedConsoleOutput pco = new PipedConsoleOutput();
                 PipedConsoleInput pci = new PipedConsoleInput(null)) {