processPostExec: Import CompFactory before executing post-exec commands
To simplify adding an additional algorithm (or other component) in a postExec, import CompFactory before executing postExec commands. This allows running something like:
Reco_tf.py --CA --multithreaded --AMIConfig=q442 --postExec='cfg.addEventAlgo(CompFactory.ClusterDumper("FwdTopoDumper", ContainerName="CaloCalFwdTopoTowers", FileName="FwdTopoCluster.txt"),sequenceName="AthAlgSeq")'
cc @tadej