Bump elasticsearch from 1.4.0 to 6.8.15 in /dspace-api#20

dependabot[bot] wants to merge 1 commit intomasteratmire/CSL63:masterfrom

dependabot/maven/dspace-api/org.elasticsearch-elasticsearch-6.8.15atmire/CSL63:dependabot/maven/dspace-api/org.elasticsearch-elasticsearch-6.8.15Copy head branch name to clipboard