trivial: back to ubuntu slaves after verifying INFRA-13063
trivial: back to ubuntu slaves after verifying INFRA-13063

git-svn-id: 6eed74fe9a15c8da84b9a8d7f2960c0406113ece@1773364 13f79535-47bb-0310-9956-ffa450edef68

JEBailey/sling,anchela/sling,ieb/sling,awadheshv/sling,vladbailescu/sling,JEBailey/sling,labertasch/sling,anchela/sling,trekawek/sling,tmaret/sling,ieb/sling,mcdan/sling,trekawek/sling,mikibrv/sling,cleliameneghin/sling,awadheshv/sling,headwirecom/sling,mcdan/sling,vladbailescu/sling,ieb/sling,mikibrv/sling,roele/sling,roele/sling,tmaret/sling,mcdan/sling,mcdan/sling,vladbailescu/sling,mcdan/sling,mikibrv/sling,roele/sling,mikibrv/sling,labertasch/sling,mcdan/sling,trekawek/sling,vladbailescu/sling,ist-dresden/sling,awadheshv/sling,cleliameneghin/sling,JEBailey/sling,ist-dresden/sling,labertasch/sling,headwirecom/sling,vladbailescu/sling,anchela/sling,roele/sling,labertasch/sling,awadheshv/sling,JEBailey/sling,headwirecom/sling,tmaret/sling,ieb/sling,ieb/sling,mikibrv/sling,ist-dresden/sling,ist-dresden/sling,awadheshv/sling,headwirecom/sling,trekawek/sling,mikibrv/sling,ieb/sling,tmaret/sling,anchela/sling,labertasch/sling,trekawek/sling,cleliameneghin/sling,cleliameneghin/sling,anchela/sling,ist-dresden/sling,trekawek/sling,tmaret/sling,headwirecom/sling,cleliameneghin/sling,roele/sling,JEBailey/sling,awadheshv/sling