ice: Handle null ListObjectsV2Response.isTruncated when talking to minio (fixes #60)

Author: shyiko

ice/src/main/java/com/altinity/ice/cli/internal/s3/S3.java

@@ -75,7 +75,7 @@ public static List<String> listWildcard(S3Client s3, String bucketName, String p
       if (r.size() >= limit) {
         break;
       }
-      continuationToken = response.isTruncated() ? response.nextContinuationToken() : null;
+      continuationToken = response.nextContinuationToken();
     } while (continuationToken != null);
     return r;
   }