Bump elasticsearch from 1.4.0 to 6.8.15 in /dspace-api#755

dependabot[bot] wants to merge 1 commit intovt_6_x_devVTUL/vtechworks:vt_6_x_devfrom

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