[Bugs] #1738 UNSP: 3G: Error when trying to connect without gsm settings

[Sugar Labs Bugs]

#1738: 3G: Error when trying to connect without gsm settings
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    Reporter:  erikos                     |          Owner:  tomeu            
        Type:  defect                     |         Status:  new              
    Priority:  Unspecified by Maintainer  |      Milestone:  0.88             
   Component:  sugar                      |        Version:  Git as of bugdate
    Severity:  Major                      |       Keywords:                   
Distribution:  Unspecified                |   Status_field:  Unconfirmed      
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 Scenario: No settings are done in the Control Panel. GSM Device is
 connected. Connect button is pressed in the gsm device palette.

 We create a gsm connection in model.networks.py by default. When one tries
 to connect without any settings made the call
 "network.find_gsm_connection()" will return a connection - the default
 one, and tries to connect. We catch a runtime error in that case.

 I think we should not create a connection unless settings in the CP
 section have been made.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/1738>
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