bug fix, report generation failed if target directory didn't exist

Former-commit-id: 41dacefc1453b7625ccee3c697e1348f36eebbd1

src/main/java/org/owasp/dependencycheck/reporting/ReportGenerator.java

@@ -193,6 +193,11 @@ public class ReportGenerator {
         OutputStream outputStream = null;
 
         try {
+            File foutDir = new File(outFileName).getParentFile();
+            if (!foutDir.exists()) {
+                foutDir.mkdirs();
+            }
+
             outputStream = new FileOutputStream(outFileName);
             writer = new OutputStreamWriter(outputStream, "UTF-8");
             //writer = new BufferedWriter(oswriter);