iPatFitterUtis, remove un-needed mutable due to unneeded const
requested to merge ATLAS-EGamma/athena:IPatFitterUtils_remove_unneeded_mutable_due_to_uneeded_const into master
Trying to edge closer to allow enabling the checker for IPatFitterUtils.
Remove some mutable that not needed to be and caused by some uneeded const.
i.e actually we have non-const FitParameters which seems we can update , no need to pretend they are const and introduce mutable.
@nkoehler and @emoyse these are clutter but do not think they had a real impact (as it seems there were not-const to start with?)
(There are also some formatting white space changes which you can hide from the diff by unchecking the relevant box)
Edited by Christos Anastopoulos