[com1] time dependent release massPerParticleDeterminationMethod MPPKR

[awirb]

if timeDependentRelease=True, massPerParticleDeterminationMethod = MPPKR doesn't work as relThForPart is a list and not a float in getPartInitMethod(cfg, csz, relThForPart) in com1DFATools.py when called from initializeParticles in com1DFA.py

[fso42]

Do we need to implement this, or just catch it with an error?