Fixing Travis for JRegistryFormatXmlTest

The problem is that the empty `booleanfalse` returns as a autoclosed tag instead of explicitely returning a closing tag.
I couldn't track it down to a change in code, so it's maybe related to the testing enviroment itself. Maybe @mbabker knows more?

According to http://stackoverflow.com/questions/17400065/generate-xml-with-simplexmlelement-with-some-empty-filelds one can't change the behavior of `SimpleXMLElement`, thus just changing the expected result should fix it.