Task #8809: update dragnet variants file

CMake/variants/variants.dragnet

@@ -10,7 +10,9 @@ option(USE_CUDA      "Use CUDA"      ON)
 set(LOG4CPLUS_ROOT_DIR    /opt/log4cplus-1.1.2)
 set(BLITZ_ROOT_DIR        /opt/blitz-0.10)
 set(CUDA_TOOLKIT_ROOT_DIR /opt/cuda-7.0)
-set(CASACORE_ROOT_DIR     /opt/casacore-2.0.1)
+set(CASACORE_ROOT_DIR     /opt/casacore-2.0.3)
+set(CASAREST_ROOT_DIR     /opt/casarest)  # pkg has no releases
+set(CASA_ROOT_DIR         /opt/casasynthesis)  # for awimager2; pkg has no releases; it's a chunk of CASA, so var name is misleading, since it'll fail on the real CASA root dir
 set(DAL_ROOT_DIR          /opt/lofardal-2.5.0)
 
 # Avoid using unnecessary custom installed packages in /usr/local (NFS).