[Discover] Prevent error message of read only user without default index pattern set#54122

kertal wants to merge 5 commits intoelastic:masterelastic/kibana:masterfrom

kertal:kertal-pr-2020-01-07-fix-discover-default-index-readonly-errorkertal/kibana:kertal-pr-2020-01-07-fix-discover-default-index-readonly-errorCopy head branch name to clipboard