BIND 10 #3056: MemorySegmentMappedTest.badAllocate fails when run as root user

[BIND 10 Development]

#3056: MemorySegmentMappedTest.badAllocate fails when run as root user
-------------------------------------+-------------------------------------
                   Reporter:  muks   |                 Owner:  muks
                       Type:         |                Status:  new
  defect                             |             Milestone:
                   Priority:         |  Sprint-20130723
  medium                             |              Keywords:
                  Component:  data   |             Sensitive:  0
  source                             |           Sub-Project:  DNS
               CVSS Scoring:         |  Estimated Difficulty:  0
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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 `MemorySegmentMappedTest.badAllocate` sets the mode on the mapped file to
 0444, and tries to re-open the mapped file (call indirectly to
 `growSegment()`).

 This test works in all cases except when the user running the test is
 `root`. `root` is able to write to a mode 0444 file.

 We should fix it so that this testcase is skipped when run as the `root`
 user.

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Ticket URL: <http://bind10.isc.org/ticket/3056>
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