Apply modifications to template values based on entity owner instead watching player
When observer selects some building he can see possible units to be trained. Data about that templates are returned with id of observer what means no technologies or bonuses for selected player have been applied to the template. So observer does not see correct information in tooltip.
Differential Revision: https://code.wildfiregames.com/D2054
Fixes: #5109
Tested by: Nescio