[AutoQA] #209: complete auto CD install test driver

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#209: complete auto CD install test driver
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 Reporter:  liam   |       Owner:                                 
     Type:  task   |      Status:  new                            
 Priority:  major  |   Milestone:  Automate installation test plan
Component:  tests  |     Version:  1.0                            
 Keywords:         |  
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 complete the cd_install.py as dvd_install.py to support CD install, with
 some functions like automatically swap CD when CD1 install was completed.

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Ticket URL: <https://fedorahosted.org/autoqa/ticket/209>
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