Revision 1901904

XMLBEANS-612: Adjust classloading for better Android support

Using Classloader.getResource() for .class-files fails on Android where
the special classloader does not return class-files as resources.

As this is only done as pre-check here if loading the class will work, 
we can replace it with catching a ClassNotFoundException instead to 
only use proper reflection functionality and thus make this 
work on Android as well.