BroadleafCommerce#1293 Added a String to allow for clients to specify which type of extension to use during encoding.

(cherry picked from commit 7c35644)

Author: AustinMRooke

common/src/main/java/org/broadleafcommerce/common/sitemap/service/SiteMapServiceImpl.java

@@ -58,6 +58,8 @@
 public class SiteMapServiceImpl implements SiteMapService {
 
     protected static final Log LOG = LogFactory.getLog(SiteMapServiceImpl.class);
+    
+    protected static final String ENCODING_EXTENSION = ".gz";
 
     protected Boolean gzipSiteMapFiles;
 
@@ -115,7 +117,7 @@ public SiteMapGenerationResponse generateSiteMap() throws SiteMapException, IOEx
             gzipAndDeleteFiles(fileWorkArea, siteMapBuilder.getIndexedFileNames());
             List<String> indexFileNames = new ArrayList<String>();
             for (String fileName: siteMapBuilder.getIndexedFileNames()) {
-                indexFileNames.add(fileName + ".gz");
+                indexFileNames.add(fileName + ENCODING_EXTENSION);
             }
             smgr.setSiteMapFilePaths(indexFileNames);
         } else {
@@ -211,7 +213,7 @@ protected void gzipAndDeleteFiles(FileWorkArea fileWorkArea, List<String> fileNa
                 String fileNameWithPath = FilenameUtils.normalize(fileWorkArea.getFilePathLocation() + File.separator + fileName);
 
                 FileInputStream fis = new FileInputStream(fileNameWithPath);
-                FileOutputStream fos = new FileOutputStream(fileNameWithPath + ".gz");
+                FileOutputStream fos = new FileOutputStream(fileNameWithPath + ENCODING_EXTENSION);
                 GZIPOutputStream gzipOS = new GZIPOutputStream(fos);
                 byte[] buffer = new byte[1024];
                 int len;