Add slf4j version to versions.properties
Add slf4j version to versions.properties

s13372/SORCER,mwsobol/SORCER,mwsobol/SORCER,dudzislaw/SORCER,s8537/SORCER,dudzislaw/SORCER,s13372/SORCER,dudzislaw/SORCER,s8537/SORCER,s13372/SORCER,mwsobol/SORCER,s8537/SORCER