BIND 10 #1975: implement meta-or-container-of data source

[BIND 10 Development]

#1975: implement meta-or-container-of data source
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                   Reporter:         |                 Owner:  UnAssigned
  jinmei                             |                Status:  reviewing
                       Type:  task   |             Milestone:
                   Priority:         |  Sprint-20120612
  medium                             |            Resolution:
                  Component:  data   |             Sensitive:  0
  source                             |           Sub-Project:  DNS
                   Keywords:         |  Estimated Difficulty:  9
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by jinmei):

 One quick feedback: container_unittest.cc didn't compiler for me
 because `Container::SearchResult` is used in EXPECT_EQ without having
 corresponding operator<<.  (It's surprising to me it worked for you).

 We need to either use EXPECT_TRUE with operator== or define operator<<.

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Ticket URL: <http://bind10.isc.org/ticket/1975#comment:7>
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