Update IntelliJ compiler options to support version 2020.2 (#60322)
Update IntelliJ compiler options to support version 2020.2 (#60322)

Co-authored-by: Elastic Machine <aba0ff71c61dffd83d6f2c8185bc4b064b23c44a@users.noreply.github.com>
robin13/elasticsearch,gingerwizard/elasticsearch,nknize/elasticsearch,nknize/elasticsearch,nknize/elasticsearch,robin13/elasticsearch,scorpionvicky/elasticsearch,gingerwizard/elasticsearch,GlenRSmith/elasticsearch,gingerwizard/elasticsearch,GlenRSmith/elasticsearch,scorpionvicky/elasticsearch,nknize/elasticsearch,robin13/elasticsearch,GlenRSmith/elasticsearch,gingerwizard/elasticsearch,robin13/elasticsearch,GlenRSmith/elasticsearch,GlenRSmith/elasticsearch,nknize/elasticsearch,scorpionvicky/elasticsearch,gingerwizard/elasticsearch,robin13/elasticsearch,scorpionvicky/elasticsearch,scorpionvicky/elasticsearch,gingerwizard/elasticsearch,gingerwizard/elasticsearch