[Bugs] #1394 UNSP: Do not fail if activity mime_type was already installed

[Sugar Labs Bugs]

#1394: Do not fail if activity mime_type was already installed
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    Reporter:  alsroot                    |          Owner:  erikos                     
        Type:  defect                     |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  sugar-toolkit              |        Version:  Unspecified                
    Severity:  Unspecified                |       Keywords:  r?                         
Distribution:  Unspecified                |   Status_field:  Unconfirmed                
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 Doe to fails or hands remove, .local can contain links to previously
 installed activities.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/1394>
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