BIND 10 #1183: data source refactor refactor

[BIND 10 Development]

#1183: data source refactor refactor
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                   Reporter:  jelte  |                 Owner:  UnAssigned
                       Type:  task   |                Status:  reviewing
                   Priority:  major  |             Milestone:
                  Component:  data   |  Sprint-20110830
  source                             |            Resolution:
                   Keywords:         |             Sensitive:  0
            Defect Severity:  N/A    |           Sub-Project:  DNS
Feature Depending on Ticket:         |  Estimated Difficulty:  0
        Add Hours to Ticket:  0      |           Total Hours:  0
                  Internal?:  0      |
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Changes (by jelte):

 * owner:  jelte => UnAssigned
 * status:  assigned => reviewing


Comment:

 Ready for review.

 - added getRecords(), based on the old searchForRecords, but returns an
 IteratorContextPtr similar to getAllRecords(). Since getRecords takes the
 name, the implementation actually skips copying the name column on calls
 to getNext()
 - tests updated to use this interface, and now useless tests removed
 - removed the old api calls (searchForRecords(), getNextRecord(), and
 resetSearch())
 - getNext() takes a reference-to-array now so we can do compile-time
 checks
 - remove Name argument to getAllRecords (was unused an unnecessary, it
 already takes the zone id)
 - also took the chance to fix the memleak in failed creation of
 sqlite3accessor, by making dbparameters_ a scoped_ptr

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Ticket URL: <http://bind10.isc.org/ticket/1183#comment:2>
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