Upgrade to Grails 5 and OpenSearch 1.2.4#176

pgc-13 wants to merge 2 commits intograils-plugins:3.0.xgrails-plugins/grails-elasticsearch:3.0.xfrom

bleepltd:ochre-5.1.9bleepltd/elasticsearch-grails-plugin:ochre-5.1.9Copy head branch name to clipboard