BIND 10 #645: Little errors hinted by valgrind

[BIND 10 Development]

#645: Little errors hinted by valgrind
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           Reporter:  vorner         |                      Owner:
               Type:  defect         |                     Status:  new
           Priority:  minor          |                  Milestone:  A-Team-
          Component:  Unclassified   |  Task-Backlog
          Sensitive:  0              |                   Keywords:
Add Hours to Ticket:  0              |  Estimated Number of Hours:  0
        Total Hours:  0              |                  Billable?:  1
                                     |                  Internal?:  0
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 This is the rest of valgrind topics raised by #614. I believe this bunch
 is small and simple enough to handle them in one ticket.

 They are:
  - Invalid read in cc tests (the map there seems to be freed before the
 tests are done with it, but that's only my guess)
  - There's call to open with NULL pointer as the path in the dns tests,
 which probably shouldn't happen.
  - Some memory leaks in auth tests. The two IOEndPoint ones are already
 topic covered by #644 (the same leak got to different tests), but there's
 one more in changeUser.

 I think this one is minor, because the first two probably happen only in
 tests (but I'm not sure about it, that's why I leave it here to examine),
 and the third one happens just once per run.

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Ticket URL: <http://bind10.isc.org/ticket/645>
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