Make the RM tooling in dev-tools/create-release generic

The dev-tools/create-release scripts were originally about creating hbase core RCs (Original idea and script versions were copied over from apache spark). Subsequently, they were checked into hbase-operator-tools repo and genericized so they worked in that context. Today, after a few mods, the create-release scripts from hbase-operator-tools w/ some edits generated an RC of hbase-thirdparty.

This issue is edits on the dev-tools/create-tools on master branch so the scripts can create RCs across these three repos at least (with more to follow).