distinguish between rof and bos object_properties

rof_object_properties remains the same in boswar_db, but now has a
companion, bos_object_properties.  However, upon import into a campaign,
either becomes just object_properties.

All known campaign creation/configuration/parsing functions that use
this table have been adapted.  I think this will not affect campaign
manager user functions, unlike the *next* series of changes... (hinted
by the new bos_countries and bos_coalitions). :)