BIND 10 #2297: Fix isc-sysinfo free memory, uptime, smp output

[BIND 10 Development]

#2297: Fix isc-sysinfo free memory, uptime, smp output
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                   Reporter:  jreed  |                 Owner:  jinmei
                       Type:         |                Status:  reviewing
  defect                             |             Milestone:
                   Priority:  low    |  Sprint-20121106
                  Component:         |            Resolution:
  sysinfo                            |             Sensitive:  0
                   Keywords:         |           Sub-Project:  Core
            Defect Severity:  N/A    |  Estimated Difficulty:  4
Feature Depending on Ticket:         |           Total Hours:  0
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by jinmei):

 Thanks for the review.

 Replying to [comment:7 muks]:

 > * I have pushed some minor cleanup commits. Please check them.

 These look good.  Thanks.

 > * `make check` fails:

 Oops, lazy me.  I've fixed it, but just by introducing a filter for
 excluding the test and specify isc-sysinfo there.  I believe not doing
 rename() for sysinfo is correct (mainly for reducing dependency), so
 excluding it from this test is actually correct, but if it seems
 controversial I'm okay with reverting this change.  It's not related
 to the subject of this ticket anyway.

 > * Can you not use `str(t)` on `timedelta` object for the pretty
 printing?

 Ah, good catch.  I simply overlooked it, and that should be definitely
 better than reinventing the wheel.  I've still left some test cases
 where the result is predictable, but removed one other case due to
 possible margin errors.  And, in any case, now that it's a simple
 library call I don't think it's not that important to check each
 detailed behavior.

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Ticket URL: <http://bind10.isc.org/ticket/2297#comment:8>
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