Manage slf4j-api and -log4j12 versions
Manage slf4j-api and -log4j12 versions

This will prevent slf4j API and Log4j binding versions from diverging
even if Faunus's dependencies's versions of these libraries change in
the future.

pluradj/titan,mbrukman/titan,pluradj/titan,CYPP/titan,fengshao0907/titan,thinkaurelius/faunus,xlcupid/titan,jankotek/titan,elkingtonmcb/titan,kangkot/titan,jamestyack/titan,banjiewen/titan,evanv/titan,elkingtonmcb/titan,jamestyack/titan,jankotek/titan,mwpnava/titan,jamestyack/titan,anuragkh/titan,qiuqiyuan/titan,nvoron23/titan,CYPP/titan,jamestyack/titan,pluradj/titan,evanv/titan,elubow/titan,mbrukman/titan,mwpnava/titan,fengshao0907/titan,dylanht/titan,samanalysis/titan,xlcupid/titan,evanv/titan,qiuqiyuan/titan,graben1437/titan,wangbf/titan,xlcupid/titan,kalatestimine/titan,wangbf/titan,englishtown/titan,ThiagoGarciaAlves/titan,anuragkh/titan,jankotek/titan,graben1437/titan,hortonworks/titan,amcp/titan,dylanht/titan,kangkot/titan,CYPP/titan,thinkaurelius/titan,thinkaurelius/titan,anuragkh/titan,mbrukman/titan,fengshao0907/titan,kalatestimine/titan,nvoron23/titan,hortonworks/titan,kalatestimine/titan,mbrukman/titan,CYPP/titan,elkingtonmcb/titan,graben1437/titan,jamestyack/titan,nvoron23/titan,fengshao0907/titan,mwpnava/titan,anuragkh/titan,thinkaurelius/titan,banjiewen/titan,xlcupid/titan,samanalysis/titan,kalatestimine/titan,elkingtonmcb/titan,elkingtonmcb/titan,amcp/titan,anuragkh/titan,jankotek/titan,samanalysis/titan,thinkaurelius/titan,mwpnava/titan,dylanht/titan,tomersagi/titan,amcp/titan,elubow/titan,graben1437/titan,wangbf/titan,dylanht/titan,hortonworks/titan,kalatestimine/titan,ThiagoGarciaAlves/titan,xlcupid/titan,fengshao0907/titan,tomersagi/titan,tomersagi/titan,englishtown/titan,mwpnava/titan,jankotek/titan,kangkot/titan,qiuqiyuan/titan,elubow/titan,wangbf/titan,tomersagi/titan,pluradj/titan,evanv/titan,ThiagoGarciaAlves/titan,tomersagi/titan,hortonworks/titan,samanalysis/titan,englishtown/titan,mbrukman/titan,hortonworks/titan,evanv/titan,englishtown/titan,banjiewen/titan,banjiewen/titan,kangkot/titan,kangkot/titan,qiuqiyuan/titan,ThiagoGarciaAlves/titan,amcp/titan,wangbf/titan,qiuqiyuan/titan,thinkaurelius/faunus,elubow/titan,nvoron23/titan,ThiagoGarciaAlves/titan