Task #9048: Do not error if lofarinit.sh is not installed (which happens in derived images)

Docker/lofar-base/bashrc

 #!/bin/bash
 
 # lofar
-source ${INSTALLDIR}/lofar/lofarinit.sh
+[ -r ${INSTALLDIR}/lofar/lofarinit.sh ] && source ${INSTALLDIR}/lofar/lofarinit.sh
 
 # python-casacore
 export PYTHONPATH=${PYTHONPATH}:${INSTALLDIR}/python-casacore/lib/python2.7/site-packages