Task #9048: Added "v" to python-casacore version too to match git tags

Docker/lofar-base/Dockerfile.tmpl

@@ -138,7 +138,7 @@ RUN sudo apt-get install -y git cmake g++ gfortran libboost-system-dev libboost-
 RUN sudo apt-get install -y git make g++ python-setuptools libboost-python-dev && \
     mkdir ${INSTALLDIR}/python-casacore && \
     cd ${INSTALLDIR}/python-casacore && git clone https://github.com/casacore/python-casacore && \
-    if [ "$PYTHON_CASACORE_VERSION" != "latest" ]; then cd ${INSTALLDIR}/python-casacore/python-casacore && git checkout tags/${PYTHON_CASACORE_VERSION}; fi && \
+    if [ "$PYTHON_CASACORE_VERSION" != "latest" ]; then cd ${INSTALLDIR}/python-casacore/python-casacore && git checkout tags/v${PYTHON_CASACORE_VERSION}; fi && \
     cd ${INSTALLDIR}/python-casacore/python-casacore && ./setup.py build_ext -I${INSTALLDIR}/wcslib/include:${INSTALLDIR}/casacore/include/:${INSTALLDIR}/cfitsio/include -L${INSTALLDIR}/wcslib/lib:${INSTALLDIR}/casacore/lib/:${INSTALLDIR}/cfitsio/lib/ && \
     mkdir -p ${INSTALLDIR}/python-casacore/lib/python${PYTHON_VERSION}/site-packages/ && \
     mkdir -p ${INSTALLDIR}/python-casacore/lib64/python${PYTHON_VERSION}/site-packages/ && \