BIND 10 #2834: update ConfigurableClientList::getCachedZoneWriter with new interface

[BIND 10 Development]

#2834: update ConfigurableClientList::getCachedZoneWriter with new interface
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |  jinmei
            Priority:  medium        |                       Status:
           Component:  Unclassified  |  reviewing
            Keywords:                |                    Milestone:
           Sensitive:  0             |  Sprint-20130423
         Sub-Project:  DNS           |                   Resolution:
Estimated Difficulty:  4             |                 CVSS Scoring:
         Total Hours:  0             |              Defect Severity:  N/A
                                     |  Feature Depending on Ticket:
                                     |  shared memory data source
                                     |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Changes (by vorner):

 * owner:  vorner => jinmei


Comment:

 Hello

 First, the code itself looks almost OK. But I don't see how it fits into
 the whole picture. What does the ticket do/why is it needed? Or is it just
 cleanup/refactoring ticket? It seems there are too many layers around to
 see what each one of them actually does.

 Also, several files now contain tabs.

 I guess the files `src/lib/datasrc/tests/zone_finder_context_unittest.cc`
 and `src/lib/datasrc/tests/zone_loader_unittest.cc` could benefit from
 using the `loadZoneIntoTable` function.

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Ticket URL: <http://bind10.isc.org/ticket/2834#comment:6>
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