putting back the slf4j/log4j implementation with scope runtime
putting back the slf4j/log4j implementation with scope runtime


Former-commit-id: 815167bb682ee6052bdd141e4aa884cebbb6897d
kermitt2/grobid,kermitt2/grobid,kermitt2/grobid,kermitt2/grobid,kermitt2/grobid,kermitt2/grobid