public void shutdown() {
        if (serverProcess != null) {
            serverProcess.destroyForcibly();
            serverInstances.remove(port);
        }
    }
Starts the local server. Downloads the latest conductor build from the maven repo If you want
to start the server from a specific download location, set `repositoryURL` system property
with the link to the actual downloadable server boot jar file.

<p><b>System Properties that can be set</b> conductorVersion: when specified, uses this
version of conductor to run tests (and downloads from maven repo) repositoryURL: full url
where the server boot jar can be downloaded from. This can be a public repo or internal
repository, allowing full control over the location and version of the conductor server
java-sdk/src/main/java/com/netflix/conductor/sdk/testing/LocalServerRunner.java