Josh Elser created ACCUMULO-4135:
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             Summary: Change Kerberos impersonation configuration keys
                 Key: ACCUMULO-4135
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4135
             Project: Accumulo
          Issue Type: Bug
          Components: core
    Affects Versions: 1.7.0
            Reporter: Josh Elser
            Assignee: Josh Elser
             Fix For: 1.7.1, 1.8.0


For the user impersonation support with Kerberos, we need to be able to 
represent the following:

For userA, what other users may userA "act" as and from what host(s) may userA 
do this from.

This was represented as the following in accumulo-site.xml:

* {{<prefix>.userA.users}}=user1,user2,user3...
* {{<prefix>.userA.hosts}}=fqdn1,fqdn2,fqdn3...

Because we're dealing with Kerberos, "userA" is actually something like 
"primary/instance@REALM".

I've recently found out that Ambari doesn't like this and apparently it would 
be prohibitively difficult to change it there (urlencode, what?). I'll add some 
new configuration properties here that change the structure so that there are 
options for users to configure this through all deployment mechanisms.



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