Draft: read cluster corrections from ParamFiles
Instead of reading the Calo cluster corrections from the Conditions DB, read the values from a json file in ParamFiles.
Although the Cluster covariance values and E S L correction parameters are read from ParamFiles, I don't know how to remove the ConditionAccessorHolder
from CaloCorrectionBase.cpp
and ClusterCovarianceMatrixTool.cpp
without breaking the code.