remote spark driver can use ip to connect Hive Client

There is no DNS in some real cluster network.

When we create a HiveClient in a Gateway machine, and submit a sql for HiveonSpark, then
1. the HiveClient will spark-submit a RemoteDriver class to YARN cluster, with args --remote-host which value is the Gateway hostname
2. the RemoteDriver which run on one slave of the YARN cluster, and it will connect to Gateway use the value of arg(--remote-host)
3. if the slave do not resolve the Gateway hostname(no DNS)，it will connect failed

So, we can use ip of the Gateway for the --remote-host , and the slave can use ip to connect Hive Client on the Gateway