(maint) Use JDK11 instead of 10 in travis-ci
(maint) Use JDK11 instead of 10 in travis-ci

puppetlabs/puppetserver,puppetlabs/puppet-server,puppetlabs/puppetserver,puppetlabs/puppetserver,puppetlabs/puppet-server,puppetlabs/puppetserver,puppetlabs/puppet-server