AmazonS3: Ensure SAXParserFactory sets valid/expected input params

Change Ie8a9d411fc19e8b7bf86c0b4df0b02153a0e9444 broke setting
valid/expected input parameters for the XML parser. This can be fixed
by calling SaxParserFactory#setNamespaceAware, see [1]. Also see earlier
fix in [2].

[1] https://stackoverflow.com/questions/24891323/namespace-handling-with-sax-in-java
[2] I05e993032ab3a6afb78634290b578ebc73cf1cbd

Bug: jgit-87
Change-Id: Id4e9eebac8d9de81e5d48a608066db3cc862e15c

org.eclipse.jgit/src/org/eclipse/jgit/transport/AmazonS3.java

@@ -757,8 +757,10 @@ void list() throws IOException {
 
 					final XMLReader xr;
 					try {
-						xr = SAXParserFactory.newInstance().newSAXParser()
-								.getXMLReader();
+						SAXParserFactory saxParserFactory = SAXParserFactory
+								.newInstance();
+						saxParserFactory.setNamespaceAware(true);
+						xr = saxParserFactory.newSAXParser().getXMLReader();
 					} catch (SAXException | ParserConfigurationException e) {
 						throw new IOException(
 								JGitText.get().noXMLParserAvailable, e);