BIND 10 #2480: use real data sources in auth QueryTest

[BIND 10 Development]

#2480: use real data sources in auth QueryTest
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            Reporter:  jinmei        |                        Owner:
                Type:  defect        |                       Status:  new
            Priority:  medium        |                    Milestone:  Next-
           Component:  b10-auth      |  Sprint-Proposed
           Sensitive:  0             |                     Keywords:
         Sub-Project:  DNS           |              Defect Severity:  N/A
Estimated Difficulty:  0             |  Feature Depending on Ticket:
         Total Hours:  0             |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 Currently bin/auth `QueryTest` only uses the mock data source and its
 zone finder.  We need the mock to test some tricky/unusual cases, but
 for normal cases we should also use real data sources, at least
 the in-memory (only the new version should be enough), and preferably
 database-based one (which currently means SQLite3).

 I guess it's not difficult to extend the current cases using
 value-parameterized tests (TEST_P) or type-parameterized tests
 (TYPED_TEST), skipping some specific cases with the real data sources
 if they only work with the mock.

 We should also unify the extension introduced in #2471, where only
 one test case was extended for the in-memory implementation.

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Ticket URL: <http://bind10.isc.org/ticket/2480>
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BIND 10 Development