tree e50b3ec356d1b45c4d4a82f170b91d6c250dfff3
parent 0804c8ea8ece67d01ababec616c9ad8e3b15dc9f
author captainzmc <micahzhao@tencent.com> 1570952543 +0200
committer Marco Gaido <mgaido@apache.org> 1570952543 +0200

[LIVY-356][SERVER] Add LDAP authentication for livy-server.

## What changes were proposed in this pull request?
Currently, livy-server doesn't support LDAP Authentication from client to server(livy). We need to add LDAP authentication as that's preferable method due to security reasons.
Here we reimplement LdapAuthenticationHandle, which is new in hadoop2.8+.
## How was this patch tested?

UTs tests for this part have been added. We can test in UTs

Author: captainzmc <micahzhao@tencent.com>
Author: Janki Akhani <jakhani@linkedin.com>

Closes #231 from captainzmc/add-ldap.