Address code review comments

                        <configuration>

                            <title>Kafka Connect Elasticsearch</title>

                            <logo>logos/elasticsearch.png</logo>

                            <sourceUrl>https://github.com/confluentinc/kafka-connect-elasticsearch</sourceUrl>

                            <documentationUrl>https://docs.confluent.io/current/connect/connect-elasticsearch/docs/elasticsearch_connector.html</documentationUrl>

                            <description>

                                The Elasticsearch connector allows moving data from Kafka to Elasticsearch. It writes data from a topic in Kafka to an index in Elasticsearch and all data for a topic have the same type.

                            </pluginTypes>

                            <tags>

                                <tag>Elastic</tag>

                                <tag>elasticsearch</tag>

                                <tag>search</tag>

                                <tag>key value store</tag>

                                <tag>analytics</tag>

                                <tag>log</tag>

                            </tags>

                            <requirements>

                                <requirement>Confluent Platform installed and running</requirement>

                                <requirement>Elasticsearch 5.x installed and running</requirement>

                                <requirement>Elasticsearch 5.x</requirement>

                            </requirements>

                            <deliveryGuarantee>