public void storeVersion(String vespaVersion) {
        curator.set(versionPath, Utf8.toBytes(vespaVersion));
        try (FileWriter writer = new FileWriter(versionFile)) {
            writer.write(vespaVersion);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
Contains version information for this configserver. Stored both in file system and in ZooKeeper (uses
data in ZooKeeper if distributeApplicationPackage and data found in ZooKeeper)

@author Ulf Lilleengen
@author hmusum
configserver/src/main/java/com/yahoo/vespa/config/server/version/VersionState.java