BIND 10 #2470: use MasterLoader in memory::ZoneDataLoader

[BIND 10 Development]

#2470: use MasterLoader in memory::ZoneDataLoader
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |  jinmei
            Priority:  medium        |                       Status:
           Component:  data source   |  reviewing
            Keywords:                |                    Milestone:
           Sensitive:  0             |  Sprint-20121218
         Sub-Project:  DNS           |                   Resolution:
Estimated Difficulty:  3             |                 CVSS Scoring:
         Total Hours:  0             |              Defect Severity:  N/A
                                     |  Feature Depending on Ticket:
                                     |  loadzone-ng
                                     |          Add Hours to Ticket:  1.56
                                     |                    Internal?:  0
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Comment (by jinmei):

 Replying to [comment:18 vorner]:

 > > You mean the collator calls logger directly?  If so, we cannot do
 > > this; libdns++ doesn't use logging directly, intentionally.
 >
 > OK, then there's probably nothing more we can do here. Please merge it.

 Just checking: merge with or without the awkward "<unknown source>"
 warnings?  Based on the discussion so far, I'm assuming the consensus
 is the latter (revert the warning and merge), but if that's not your
 intent please let me know.

 In any case, I'll create a separate ticket for a better solution to
 this topic.

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Ticket URL: <http://bind10.isc.org/ticket/2470#comment:20>
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