New XML files for the sample. Fixed some errors found during testing.

* applyIf no longer returns number of changed elements
* cmd line arguments, wrong assignment in main.cpp

samples/blackmiscdbus/datacontext.h

@@ -82,7 +82,7 @@ namespace BlackMiscTest
         /*!
          * \brief Default constructor
          */
-        CDataContext(QObject *parent = 0) : QObject(parent) {}
+        CDataContext(QObject *parent = nullptr) : QObject(parent) {}
 
         /*!
          * \brief ctor for Qt meta system