* add get/set for downloadstatus
* Remove unnecessary functions
* parameter update due to idc team spec change
* add errordetail set
* discussion change
* remove unecessary status updates
* rename process to processPercentage
* rename size to sizeInBytes for galleryImage
* fix pkg/status progress to progressPercentage
* move size from cloudagent galleryimage to under downloadstatus
* remove sizeInBytes from galleryimage
* add cloudinitdatasource to vhd in cloudagent
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