fix ListBucket xml response

Author: elinger

src/main/scala/io/findify/s3mock/response/ListBucket.scala

@@ -9,11 +9,17 @@ import akka.http.scaladsl.model.DateTime
 case class Content(key:String, lastModified:DateTime, md5:String, size:Long, storageClass:String)
 case class ListBucket(bucket:String, prefix: Option[String], delimiter: Option[String], commonPrefixes: List[String], contents:List[Content], isTruncated: Boolean) {
   def toXML =
-    <ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
+    <ListBucketResult>
       <Name>{bucket}</Name>
-      { prefix.map(p => <Prefix>{p}</Prefix> ) }
-      { delimiter.map(d => <Delimiter>{d}</Delimiter>) }
-      { if (commonPrefixes.nonEmpty) <CommonPrefixes> {commonPrefixes.map(cp => <Prefix>{cp}</Prefix>)} </CommonPrefixes> }
+      { if (prefix.isDefined) <Prefix>{prefix.get}</Prefix> }
+      { if (delimiter.isDefined) <Delimiter>{delimiter.get}</Delimiter> }
+      { if (commonPrefixes.nonEmpty)
+      {commonPrefixes.map(cp =>
+      <CommonPrefixes>
+        <Prefix>{cp}</Prefix>
+      </CommonPrefixes>
+      )}
+      }
       <KeyCount>{contents.length}</KeyCount>
       <MaxKeys>1000</MaxKeys>
       <IsTruncated>{isTruncated}</IsTruncated>