[Snyk] Security upgrade ubuntu from trusty to trusty-20190425#2

snyk-bot wants to merge 1 commit intomastersabman/docker.github.io:masterfrom

snyk-fix-b6916ea0120994ab3e3f600603b549ffsabman/docker.github.io:snyk-fix-b6916ea0120994ab3e3f600603b549ffCopy head branch name to clipboard