allow using the TestFacility without the testable mode, which can be useful...

allow using the TestFacility without the testable mode, which can be useful for some tests of the framework itself

include/TestFacility.h

@@ -26,11 +26,11 @@ namespace ChimeraTK {
      * the instance of the TestFacility must not be created before the application
      * (i.e. usually not before the main() routine). The application will
      *  automatically be put into the testable mode and initialised. */
-    TestFacility() {
+    explicit TestFacility(bool enableTestableMode = true) {
       auto pvManagers = createPVManager();
       pvManager = pvManagers.first;
       Application::getInstance().setPVManager(pvManagers.second);
-      Application::getInstance().enableTestableMode();
+      if(enableTestableMode) Application::getInstance().enableTestableMode();
       Application::getInstance().initialise();
     }