switched to Java8
switched to Java8

Signed-off-by: Kai Kreuzer <31ea678c44dc4e8e22ccfd165592dd71a30e46ae@openhab.org>

ollie-dev/openhab,robnielsen/openhab,watou/openhab,watou/openhab,Snickermicker/openhab,Snickermicker/openhab,idserda/openhab,CrackerStealth/openhab,watou/openhab,ollie-dev/openhab,berndpfrommer/openhab,RafalLukawiecki/openhab1-addons,hmerk/openhab,docbender/openhab,idserda/openhab,Mixajlo/openhab,robnielsen/openhab,ssalonen/openhab,svenschreier/openhab,openhab/openhab,kreutpet/openhab,doubled-ca/openhab1-addons,lewie/openhab,LaurensVanAcker/openhab,docbender/openhab,bbesser/openhab1-addons,kreutpet/openhab,TheNetStriker/openhab,docbender/openhab,bbesser/openhab1-addons,kreutpet/openhab,theoweiss/openhab,Mixajlo/openhab,svenschreier/openhab,ssalonen/openhab,juri8/openhab,RafalLukawiecki/openhab1-addons,frami/openhab,idserda/openhab,joek/openhab1-addons,ollie-dev/openhab,falkena/openhab,robnielsen/openhab,svenschreier/openhab,lewie/openhab,watou/openhab,RafalLukawiecki/openhab1-addons,doubled-ca/openhab1-addons,idserda/openhab,theoweiss/openhab,ollie-dev/openhab,doubled-ca/openhab1-addons,ssalonen/openhab,hmerk/openhab,computergeek1507/openhab,falkena/openhab,doubled-ca/openhab1-addons,frami/openhab,savageautomate/openhab,joek/openhab1-addons,ollie-dev/openhab,ssalonen/openhab,openhab/openhab,dmize/openhab,lewie/openhab,kreutpet/openhab,svenschreier/openhab,joek/openhab1-addons,Snickermicker/openhab,cdjackson/openhab,berndpfrommer/openhab,TheNetStriker/openhab,ollie-dev/openhab,savageautomate/openhab,robnielsen/openhab,kreutpet/openhab,frami/openhab,idserda/openhab,theoweiss/openhab,theoweiss/openhab,dmize/openhab,ssalonen/openhab,openhab/openhab,Snickermicker/openhab,lewie/openhab,watou/openhab,cdjackson/openhab,CrackerStealth/openhab,svenschreier/openhab,bbesser/openhab1-addons,TheNetStriker/openhab,LaurensVanAcker/openhab,docbender/openhab,juri8/openhab,TheNetStriker/openhab,falkena/openhab,idserda/openhab,CrackerStealth/openhab,doubled-ca/openhab1-addons,computergeek1507/openhab,Mixajlo/openhab,juri8/openhab,openhab/openhab,frami/openhab,docbender/openhab,joek/openhab1-addons,RafalLukawiecki/openhab1-addons,robnielsen/openhab,theoweiss/openhab,hmerk/openhab,cdjackson/openhab,bbesser/openhab1-addons,LaurensVanAcker/openhab,frami/openhab,CrackerStealth/openhab,openhab/openhab,cdjackson/openhab,CrackerStealth/openhab,dmize/openhab,hmerk/openhab,juri8/openhab,svenschreier/openhab,Mixajlo/openhab,juri8/openhab,docbender/openhab,lewie/openhab,computergeek1507/openhab,LaurensVanAcker/openhab,Mixajlo/openhab,robnielsen/openhab,computergeek1507/openhab,kreutpet/openhab,falkena/openhab,bbesser/openhab1-addons,LaurensVanAcker/openhab,openhab/openhab,docbender/openhab,watou/openhab,berndpfrommer/openhab,falkena/openhab,dmize/openhab,CrackerStealth/openhab,TheNetStriker/openhab,berndpfrommer/openhab,theoweiss/openhab,falkena/openhab,computergeek1507/openhab,dmize/openhab,bbesser/openhab1-addons,hmerk/openhab,doubled-ca/openhab1-addons,computergeek1507/openhab,Snickermicker/openhab,savageautomate/openhab,lewie/openhab,TheNetStriker/openhab,RafalLukawiecki/openhab1-addons,savageautomate/openhab,falkena/openhab,joek/openhab1-addons,juri8/openhab,RafalLukawiecki/openhab1-addons,berndpfrommer/openhab,watou/openhab,ssalonen/openhab,LaurensVanAcker/openhab,cdjackson/openhab,berndpfrommer/openhab,lewie/openhab,TheNetStriker/openhab,joek/openhab1-addons,juri8/openhab,dmize/openhab,Mixajlo/openhab,Snickermicker/openhab,savageautomate/openhab,savageautomate/openhab,cdjackson/openhab,frami/openhab,hmerk/openhab