BS-6898 readd sl4J
Merge branch 'BS-6898_Test_postgres_on_tomcat7' of github.com:bonitasoft/bonita-engine into BS-6898_Test_postgres_on_tomcat7
Merge branch 'BS-6898_Test_postgres_on_tomcat7' of github.com:bonitasoft/bonita-engine into BS-6898_Test_postgres_on_tomcat7
Merge branch 'BS-6898_Test_postgres_on_tomcat7' of github.com:bonitasoft/bonita-engine into BS-6898_Test_postgres_on_tomcat7