Update default variable names
Update default variable names

- use "Service state duration" instead of "Service duration"
- use "Host state duration" instead of "Host duration"

staute/shinken_package,dfranco/shinken,fpeyre/shinken,mohierf/shinken,fpeyre/shinken,peeyush-tm/shinken,fpeyre/shinken,rednach/krill,dfranco/shinken,peeyush-tm/shinken,geektophe/shinken,rednach/krill,peeyush-tm/shinken,naparuba/shinken,mohierf/shinken,staute/shinken_package,naparuba/shinken,savoirfairelinux/shinken,fpeyre/shinken,savoirfairelinux/shinken,peeyush-tm/shinken,mohierf/shinken,mohierf/shinken,staute/shinken_package,savoirfairelinux/shinken,mohierf/shinken,rednach/krill,dfranco/shinken,savoirfairelinux/shinken,savoirfairelinux/shinken,naparuba/shinken,rednach/krill,rednach/krill,dfranco/shinken,staute/shinken_package,geektophe/shinken,rednach/krill,fpeyre/shinken,peeyush-tm/shinken,naparuba/shinken,naparuba/shinken,dfranco/shinken,staute/shinken_package,mohierf/shinken,geektophe/shinken,geektophe/shinken,geektophe/shinken,naparuba/shinken,dfranco/shinken,geektophe/shinken,peeyush-tm/shinken,savoirfairelinux/shinken,fpeyre/shinken,staute/shinken_package