Major Description
Currently Solr kerberos authentication plugin delegates the core logic to Hadoop authentication framework. But the configuration parameters required by the Hadoop authentication framework are hardcoded in the plugin code itself.
https://github.com/apache/lucene-solr/blob/5b770b56d012279d334f41e4ef7fe652480fd3cf/solr/core/src/java/org/apache/solr/security/KerberosPlugin.java#L119
The problem with this approach is that we need to make code changes in Solr to expose new capabilities added in Hadoop authentication framework. e.g. HADOOP-12082
We should implement a generic Solr authentication plugin which will accept configuration parameters via security.json (in Zookeeper) and delegate them to Hadoop authentication framework. This will allow to utilize new features in Hadoop without code changes in Solr.
