Renaming AliHLTReconstructorBase to AliHLTPluginBase to reflect the more common role. The change is backward campatible in order to run macros of older AliRoot versions. Adding the AliHLTPluginBase to AliHLTSimulation in order to support definition of HLT chains within the same macro. Incorporating chain definition into sim-hlt-tpc.C macro and deleting separate conf-tpc-esd.C macro. Removing command line initialization for magnetic field -> rely on OCDB object.