MIRTH-2297: Fixed bug that caused a NullPointerException in convertDICOM when the DICOM report contains a compressed image.
Fixed problem with ObjectXMLSerializer not being able to deserialize Migratable objects that contain XML-invalid characters. Changed ObjectXMLSerializer to use XPP3 to parse the XML and build a DOM document instead of the default SAX parser in Java.

Updated all projects that use XStream to include the full xpp3-1.1.4c jar, which contains a class that builds the DOM document using XPP.
Issue: MIRTH-2692
Updated Manager's build file to reference xpp3-1.1.4c.jar instead of xpp3_min-1.1.4c.jar.
Issue: MIRTH-2692