[Trac #1453] DataStore.update() method should have in_signature 'sa{ss}s'

[Zarro Boogs per Child]

#1453: DataStore.update() method should have in_signature 'sa{ss}s'
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  Reporter:  tomeu      |       Owner:  bcsaller
      Type:  defect     |      Status:  new     
  Priority:  high       |   Milestone:  BTest-4 
 Component:  datastore  |     Version:          
Resolution:             |    Keywords:          
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Changes (by marco):

  * priority:  normal => high
  * milestone:  Untriaged => BTest-4

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Ticket URL: <http://dev.laptop.org/ticket/1453#comment:1>
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