Support secured ZooKeeper cluster for OpenMLDB

For C++ and Java modules like NameServer and TaskManager, we should support secured ZooKeeper cluster by setting jaas file and krb5 file.

Here is the example code the enable secured ZK in Java processes.

```
if (isZkSecure) {
LOG.info("Connect with secure ZooKeeper cluster, use " + jaasFile + " and " + krb5File);
System.setProperty("java.security.auth.login.config", jaasFile);
System.setProperty("java.security.krb5.conf", krb5File);
}
```