DEP-78 : Upgrade slf4j 1.7.5 -> 1.7.7
DEP-79 : Upgrade testng 6.8 -> 6.8.8
DEP-80 : Upgrade XWiki 5.0.2 -> 5.0.3
DEP-81 : Upgrade flying Saucer 9.0.1 -> 9.0.6
DEP-82 : Upgrade Quartz 2.1.6 -> 2.1.7