Bugfix calculation of CCU accounted in other sectors in reportEmi

[fschreyer]

This is a bugfix of #666. Negative emissions in industry from storing carbon from fossil synfuels were not calculated correctly. This also led to too high gross emissions as gross emissions are calculated by Net Emissions - CDR - CCU Accounted in Other Sectors.

Now, we have the following variable relations:

(CDR and CCU accounted in other sectors defined negative, CDR variables do not include carbon from fossil synfuels)

-("Emi|CO2|CDR|Industry CCS|Synthetic Fuels"  
  + "Emi|CO2|Accounted in Other Sectors via CCU|Energy|Industry|Fossil Synfuel CCS") 
= "Carbon Management|Storage|Industry Energy|+|Synfuel"

-("Emi|CO2|CDR|Materials|+|Plastics" + 
  "Emi|CO2|Accounted in Other Sectors via CCU|Energy|Industry|Fossil Synfuel Plastics Sequestration" ) 

=

 Carbon Management|Materials|Plastics|Waste|++|Other destination 
 * ( Carbon Management|Materials|Plastics|+|Synfuels + Carbon Management|Materials|Plastics|+|Biomass ) 
 / Carbon Management|Materials|+|Plastics

[amerfort]

Thanks for spotting and fixing this!