Fixed issue #3195 ordering contribution list (#3589)

* issue-#3195: order contribution list refactored

* issue-#3195: ordered contribution list

Author: isnirp

app/src/main/java/fr/free/nrw/commons/upload/UploadService.java

@@ -286,7 +286,7 @@ private void uploadContribution(Contribution contribution) {
                         contribution.setFilename(canonicalFilename);
                         contribution.setImageUrl(uploadResult.getImageinfo().getOriginalUrl());
                         contribution.setState(Contribution.STATE_COMPLETED);
-                        contribution.setDateUploaded(CommonsDateUtil.getIso8601DateFormatShort()
+                        contribution.setDateUploaded(CommonsDateUtil.getIso8601DateFormatTimestamp()
                                 .parse(uploadResult.getImageinfo().getTimestamp()));
                         compositeDisposable.add(contributionDao
                                 .save(contribution)

app/src/main/java/fr/free/nrw/commons/utils/CommonsDateUtil.java

@@ -13,11 +13,21 @@ public class CommonsDateUtil {
 
     /**
      * Gets SimpleDateFormat for short date pattern
-     * @return
+     * @return simpledateformat
      */
     public static SimpleDateFormat getIso8601DateFormatShort() {
         SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.ROOT);
         simpleDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
         return simpleDateFormat;
     }
+
+    /**
+     * Gets the timestamp pattern for a date
+     * @return timestamp
+     */
+    public static SimpleDateFormat getIso8601DateFormatTimestamp() {
+        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.ROOT);
+        simpleDateFormat.setTimeZone(TimeZone.getTimeZone("UTC"));
+        return simpleDateFormat;
+    }
 }