rework LArCalib_OFCPhysConfig to avoid duplication of shape object

This config-file is supposed to calculate Optimal Filtering coefficients for both, the no-pileup scenario and the pile-up scenario is one go. The OFCAlg also produces a Shape object that is the same in both cases. This leads to a clash when recording the object to the output sqlite file. This MR reworks the configuration to avoid this clash. If a set of pile-up OFCs is requested, the non-pileup set is calculated as well and the shape of this one is recorded.

Currently a draft for @pavol to comment ...