Remove broken concept of Mapping Properties that was used on legacy
simulation. We do not want to use this concept any more, any mapping
should be done by rule themself. Removing mapping properties leads
to more generic concepts and much simpler code.

With legacy simulation, in case of returned sale packing list
(in case we want to invoice in same sale invoice usual sale packing
list and returned sale packing list) :
AR (delivering_rule):
  -> SM (source/A, destination/B)
    -> AR (invoicing_rule, having mapped_property mapping
           source to destination and vice versa)
      -> SM (source/A, destination/B) builders and solvers
         where doing sm.getMappedProperty('source') which was equivalent
         to sm.getProperty('destination'), thus the mapping was done
         in live time

Now in such case, we should implement mapping directly at rule level,
and this should give:
AR (delivering_rule):
  -> SM (source/A, destination/B)
    -> AR (invoicing_rule, reversing source and destination)
      -> SM (source/B, destination/A) here we directly have properties
         we wish, no need of hacks on builders and solvers