Add Pin/Puk Configuration to 3G (GSM) Modem Support

[Dcastelo]

In ticket #1622 the feature "3G Modem Support" was added. In this feature the user could configure the connection properties in control panel (user, password, number and apn). With this improve two new properties are taken into account: Pin and Puk code for the Sim Card. Both properties are usefull just when the Sim card requires this information.

 http://wiki.sugarlabs.org/go/Features/3G_Support

[Dcastelo]

If the SIM requires Pin/Puk and the configuration is wrong, the message "Authentication Error", "Sim requires Pin/Puk" is shown in the device icon. When users clicks over the message the connect option is shown again.

Test Case (Sim requires Pin/Puk configuration):
1. Go to control panel, Modem Configuration
2. Set username, password, number, apn and a wrong Pin/Puk configuration
3. Save changes and restart
4. Connect the device and wait until the device icon appears
5. Click on connect item- The system shows "Authentication Error" "Sim requires Pin/Puk configuration"
6. Click over the message "Sim requires Pin/Puk configuration"
7. Go to control panel, Modem Configuration and set a valid Pin/Puk configuration.
8. Save changes and restart
9. Click on connect item- The system shown the connection information
10. Click on disconnect item

[Dcastelo]

3G Support-Connection-Info.patch V1

[Dcastelo]

3G Support- Pin-Puk-Configuration.patch V1

[tomeu]

sorry, the patches don't apply on top of head, can you please rebase?

[tomeu]

rebased, applies on top of #1652

[Dcastelo]

Pin-Puk-Configuration- V2 (mixed of last two patches)

[tomeu]

Pushed, thanks!