THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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NONE: no authentication check – plain SASL transport
LDAP: LDAP/AD based authentication
KERBEROS: Kerberos/GSSAPI authentication
CUSTOM: Custom authentication provider (use with property hive.server2.custom.authentication.class)
PAM: Pluggable authentication module (added in Hive 0.13.0 with HIVE-6466)
NOSASL: Raw transport (added in Hive 0.13.0)
hive.server2.authentication.kerberos.keytab
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