Prepare for release of 2.1.0

[sarbajitdutta]

• Esearchresults table now include lookupType. This allows us to more reliably identify the count of candidate articles for the articleCountStrategy in cases where the ONLY_NEWLY_ADDED_PUBLICATIONS is used. #455
• For articleCountStrategy, candidate article count now relies on distinct count of all retrieved publications except those from the gold standard retrieval strategy. #454
• Time-based lookups against PubMed were only looking for articles based on date added to Entrez. This caused some publications to be missed. Now we're searching for that or date added to PubMed. #450
• Update Swagger from 2.0 → 3.0. #447
• Update Java 8 → 11. #446
• Environment variable JAVA_OPTS was added to docker image to specify java heap size https://github.com/wcmc-its/ReCiter/blob/a3d5d4665e8692853ca69f2db0caba0eb56f557d/kubernetes/k8-deployment.yaml#L81-L82 and also to Dockerfile https://github.com/wcmc-its/ReCiter/blob/a3d5d4665e8692853ca69f2db0caba0eb56f557d/Dockerfile#L8
• Output the top keywords and their counts for accepted publications. This will be used in Publication Manager. #442
• Output count of pubs where userAssertion = NULL as attribute enhancement. This will be used in Publication Manager. #399
• ReCiter Identity data model was updated to v2.0.8 https://github.com/wcmc-its/ReCiter-Identity-Model/issues/3 to include primaryOrganizationalUnit, primaryInstitution, startDate, and endDate
• ReCiter Article data model was updated to v2.0.16. This includes adding orcid identifier, affiliations and emails for authors, countOfPendingPubs, topArticleKeywords
• Fixed error running DynamoDb locally in Docker. #452
• Add healthcheck path for application use <protocol>://<host>:<port>/reciter/ping
• Upgrade to all dependencies to use latest stable releases
• AWS Codebuild images were also updated to use Java 11 and latest release
• Docker image was updated to use adoptopenjdk/openjdk11:alpine-jre for security