Allow Secure Zookeeper JAAS configuration to be programmatically set (rather 
than only by reading JAAS configuration file)
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                 Key: HBASE-4791
                 URL: https://issues.apache.org/jira/browse/HBASE-4791
             Project: HBase
          Issue Type: Bug
            Reporter: Eugene Koontz


In the currently proposed fix for HBASE-2418, there must be a JAAS file 
specified in     System.setProperty("java.security.auth.login.config"). 

However, it might be preferable to construct a JAAS configuration 
programmatically, as is done with secure Hadoop (see 
https://github.com/apache/hadoop-common/blob/a48eceb62c9b5c1a5d71ee2945d9eea2ed62527b/src/java/org/apache/hadoop/security/UserGroupInformation.java#L175).

This would have the benefit of avoiding a usage of a system property setting, 
and allow instead an HBase-local configuration setting.   



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