hive-site.xml cannot be readonly for clients

We changed the permissions on hive-site.xml from 644 to 660. This was done because the metastore password is in clear text.
This results in clients not being able to access the metastore and hive cannot run in client mode. Recomended aproach is splitting the hive configs differently for client and hive metastore host.

The password is required only for the metastore process and the hive client config should be readable to all.