SW-658: Merge a build variant fix for dop442/bob back to the release branch

CMake/variants/variants.dop442

 set(WINCC_ROOT_DIR "/opt/WinCC_OA/3.14")
-set(CASACORE_ROOT_DIR "/data/work/installed/casacore")
-set(CASAREST_ROOT_DIR "/data/work/installed/casarest")
-set(PYRAP_ROOT_DIR "/data/work/installed/pyrap")
-set(AOFLAGGER_ROOT_DIR "/data/work/installed/aoflagger")
-set(BDSF_ROOT_DIR "/data/work/installed/pybdsf/lib64/python3.6/site-packages/")
-set(DAL_ROOT_DIR "/data/work/installed/DAL")
-set(QPID_ROOT_DIR "/data/work/installed/qpid")
+set(CASACORE_ROOT_DIR "/opt/casacore")
+set(CASAREST_ROOT_DIR "/opt/casarest")
+set(PYRAP_ROOT_DIR "/opt/pyrap")
+set(AOFLAGGER_ROOT_DIR "/opt/aoflagger")
+set(BDSF_ROOT_DIR "/opt/pybdsf/lib64/python3.6/site-packages/")
+set(DAL_ROOT_DIR "/opt/DAL")
+set(QPID_ROOT_DIR "/opt/qpid")
 
 # Overwrite the compiler paths on CentOS7 for gcc6
 set(GNUCXX11_C "/opt/rh/devtoolset-6/root/usr/bin/gcc") # GNU C compiler