[Bugs] #181 NORM: replace deprecated os.popen by subprocess

[SugarLabs Bugs]

#181: replace deprecated os.popen by subprocess
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 Reporter:  alsroot          |       Owner:  tomeu      
     Type:  defect           |      Status:  new        
 Priority:  normal           |   Milestone:             
Component:  sugar-datastore  |     Version:  unspecified
 Keywords:                   |  
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 in python2.6 os.popen is marked as deprecated
 I have no idea why it breaks datastore (since thats only warning)  but
 that is fact on Mandriva(cooker) - after calling replaced code (see patch)
 datastore connections are failed (dbus timeout error).
 After replacing os.popen2 by subprocess everything is ok

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Ticket URL: <http://dev.sugarlabs.org/ticket/181>
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