Allow overriding test timeout for classes extending from ITextTest

Inheritance is not taken into account for Junit @timeout rules.
This means that if several @timeout rules are present in the class
inheritance chain, and even if timeout is specified as an attribute
of the @test annotation, the minimal timeout would be decisive.
This fix allows classes extending from ITextTest setting bigger
timeout for tests. Previously it was only possible to make timeout
smaller due to the fact described above.
See also junit-team/junit4#1126

Author: Snipx

pdftest/src/main/java/com/itextpdf/test/ITextTest.java

@@ -66,7 +66,7 @@ public abstract class ITextTest {
     protected final Logger LOGGER = LoggerFactory.getLogger(getClass());
 
     @Rule
-    public Timeout testTimeout = new Timeout(5, TimeUnit.MINUTES);
+    public Timeout testTimeout = getTestTimeout();
 
     /**
      * Creates a folder with a given path, including all necessary nonexistent parent directories.
@@ -151,21 +151,8 @@ public static void restoreCryptographyRestrictions() {
         }
     }
 
-    private static void deleteDirectoryContents(String path, boolean removeParentDirectory) {
-        File file = new File(path);
-        if (file.exists() && file.listFiles() != null) {
-            for (File f : file.listFiles()) {
-                if (f.isDirectory()) {
-                    deleteDirectoryContents(f.getPath(), false);
-                    f.delete();
-                } else {
-                    f.delete();
-                }
-            }
-            if (removeParentDirectory) {
-                file.delete();
-            }
-        }
+    protected Timeout getTestTimeout() {
+        return new Timeout(5, TimeUnit.MINUTES);
     }
 
     protected byte[] readFile(String filename) throws IOException {
@@ -191,4 +178,21 @@ protected String createStringByEscaped(byte[] bytes) {
         return buf.toString();
     }
 
+    private static void deleteDirectoryContents(String path, boolean removeParentDirectory) {
+        File file = new File(path);
+        if (file.exists() && file.listFiles() != null) {
+            for (File f : file.listFiles()) {
+                if (f.isDirectory()) {
+                    deleteDirectoryContents(f.getPath(), false);
+                    f.delete();
+                } else {
+                    f.delete();
+                }
+            }
+            if (removeParentDirectory) {
+                file.delete();
+            }
+        }
+    }
+
 }