add group = org.opensearch.plugin (#167) (#169)

Signed-off-by: prudhvigodithi <pgodithi@amazon.com>
(cherry picked from commit 13d9248)

Co-authored-by: Prudhvi Godithi <pgodithi@amazon.com>

build.gradle

@@ -113,6 +113,7 @@ publishing {
  pom {
  name = pluginName
  description = pluginDescription
+ groupId = "org.opensearch.plugin"
  licenses {
  license {
  name = "The Apache License, Version 2.0"