Bump pdfbox to latest version

Author: cgivre

contrib/format-pdf/pom.xml

@@ -52,7 +52,7 @@
     <dependency>
       <groupId>org.apache.pdfbox</groupId>
       <artifactId>pdfbox</artifactId>
-      <version>2.0.24</version>
+      <version>2.0.25</version>
       <exclusions>
         <exclusion>
           <groupId>commons-logging</groupId>

contrib/format-pdf/src/main/java/org/apache/drill/exec/store/pdf/PdfBatchReader.java

@@ -99,7 +99,7 @@ public PdfBatchReader(PdfReaderConfig readerConfig, int maxRecords) {
   @Override
   public boolean open(FileScanFramework.FileSchemaNegotiator negotiator) {
     // TODO Remove this
-    System.setProperty("java.awt.headless", "true");
+    //System.setProperty("java.awt.headless", "true");
     this.negotiator = negotiator;
 
     split = negotiator.split();