void createNode_ignoreNodeExistsException(String path) {
        try {
            curator.framework().create().creatingParentsIfNeeded().forPath(path);
        } catch (KeeperException.NodeExistsException e) {
            // ok
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
ZooKeeper implementation of {@link ApplicationLock}.

@author hakonhall
orchestrator/src/main/java/com/yahoo/vespa/orchestrator/status/ZkApplicationLock.java