Bump elasticsearch from 1.7.1 to 6.8.15 in /ontology/elasticsearch/annotation-tree-aggregator#35

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dependabot/maven/ontology/elasticsearch/annotation-tree-aggregator/org.elasticsearch-elasticsearch-6.8.15flaxsearch/BioSolr:dependabot/maven/ontology/elasticsearch/annotation-tree-aggregator/org.elasticsearch-elasticsearch-6.8.15Copy head branch name to clipboard