[RM-6172] modify pdf in result store to be in LOG10 instead of LOGe

Created on 2020-12-07 08:13:21 by Didier Vibert. % Done: 0

the idea is to continue to work with a LOGe pdf more compatible with chi2, and to have a getter that give it in LOG10.

we should check the pdf stored in the resultstore is not used in the library as an input somewhere else we will need 2 getters

at the same time, list the related quantities that should be passed from log to log10 (ie evidence, etc.) and implement the conversion