made reference test server work with application base.

tests/referenceTestDoocsServer/referenceTestDoocsServer.cc

-#include <DoocsAdapter.h>
+// FIXME: The test application is header only. It should be a compiled object
+// which is linked. No line of sourcecode required.
+#include <ChimeraTK/ControlSystemAdapter/Testing/ReferenceTestApplication.h>
 
-// Include all the control applications you want in this server
-#include <ChimeraTK/ControlSystemAdapter/Testing/IndependentTestCore.h>
+ReferenceTestApplication referenceTestApplication;
 
-BEGIN_DOOCS_SERVER("ReferenceTest DOOCS server", 10)
-   // Create static instances for all applications cores. They must not have overlapping
-   // process variable names ("location/protery" must be unique).
-static IndependentTestCore independentTestCore(doocsAdapter.getDevicePVManager());
-END_DOOCS_SERVER()