Describe the feature:

It would be nice to have a startup option that would tell startup (elastic-env) ignore any system JVM installed and to use the bundled one. Maybe an environment variable called something like ES_USE_BUNDLED_JVM? Some systems may have legacy JVMs installed in order to support older applications which would be incompatible with ES. I don't expect this to be the case on production machines, but developer machines where they are evaluating the software or just hosting a local copy for development purposes.

Another option would be that during the startup-checks, if the found JVM on JAVA_HOME is too old, try and fallback to the bundled one.