Bump hadoop-client from 2.6.3 to 2.7.0 in /dl-worker/dl-worker-writer-hdfs#87

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dependabot/maven/dl-worker/dl-worker-writer-hdfs/org.apache.hadoop-hadoop-client-2.7.0ucarGroup/DataLink:dependabot/maven/dl-worker/dl-worker-writer-hdfs/org.apache.hadoop-hadoop-client-2.7.0Copy head branch name to clipboard