Fix compilation with newest casacore
Created by: aroffringa
Due to removal of 'using namespace std' from header of casacore, using just 'vector' no longer works in DP3 header files. This commit adds std:: to all those usages.
Created by: aroffringa
Due to removal of 'using namespace std' from header of casacore, using just 'vector' no longer works in DP3 header files. This commit adds std:: to all those usages.