switch to Java 8 and update dependencies, plugins and parent to latest releases
switch to Java 8 and update dependencies, plugins and parent to latest releases

git-svn-id: 6eed74fe9a15c8da84b9a8d7f2960c0406113ece@1723054 13f79535-47bb-0310-9956-ffa450edef68

mikibrv/sling,mikibrv/sling,mmanski/sling,anchela/sling,roele/sling,tyge68/sling,tmaret/sling,trekawek/sling,ieb/sling,vladbailescu/sling,wimsymons/sling,tteofili/sling,anchela/sling,trekawek/sling,headwirecom/sling,awadheshv/sling,labertasch/sling,ieb/sling,tmaret/sling,vladbailescu/sling,headwirecom/sling,labertasch/sling,Nimco/sling,mcdan/sling,ist-dresden/sling,mcdan/sling,wimsymons/sling,tteofili/sling,mmanski/sling,Nimco/sling,ieb/sling,awadheshv/sling,anchela/sling,cleliameneghin/sling,ieb/sling,tyge68/sling,awadheshv/sling,awadheshv/sling,mikibrv/sling,labertasch/sling,trekawek/sling,mcdan/sling,ist-dresden/sling,wimsymons/sling,roele/sling,ieb/sling,cleliameneghin/sling,tteofili/sling,wimsymons/sling,mikibrv/sling,mcdan/sling,JEBailey/sling,Nimco/sling,tmaret/sling,tteofili/sling,mikibrv/sling,tyge68/sling,ist-dresden/sling,wimsymons/sling,labertasch/sling,JEBailey/sling,mmanski/sling,headwirecom/sling,trekawek/sling,tmaret/sling,Nimco/sling,mmanski/sling,anchela/sling,wimsymons/sling,vladbailescu/sling,headwirecom/sling,trekawek/sling,mcdan/sling,mcdan/sling,tteofili/sling,cleliameneghin/sling,vladbailescu/sling,mmanski/sling,ieb/sling,Nimco/sling,tmaret/sling,roele/sling,anchela/sling,ist-dresden/sling,roele/sling,tyge68/sling,tteofili/sling,cleliameneghin/sling,cleliameneghin/sling,JEBailey/sling,vladbailescu/sling,JEBailey/sling,labertasch/sling,mmanski/sling,roele/sling,awadheshv/sling,JEBailey/sling,tyge68/sling,ist-dresden/sling,mikibrv/sling,Nimco/sling,tyge68/sling,trekawek/sling,headwirecom/sling,awadheshv/sling