[WFCORE-41] Update slf4j from 1.7.2.jbossorg-1 to 1.7.7.jbossorg-1
Merge pull request #71 from jamezp/WFCORE-41

[WFCORE-41] Update slf4j from 1.7.2.jbossorg-1 to 1.7.7.jbossorg-1