* log the device list when finding dvd
* improve logging for get_dvd_device
* improve logging for mount_dvd
* more granular logging for copy_ovf_env
* provisioning logging and error cleanup
* ubuntu provisioning logging cleanup
* improve Ubuntu provisioning logging
* ubuntu provision cleanup
* debugging for cloud-init
* add validation method and logging for cloud-init
* error cleanup, fix mount
* minor cleanup
* add validate cloud-init logging
* unit test fixes
The Agent will monitor for more recent versions and update itself
(without impacting the installed version). If the new Agent fails
(in a very bad way or consistently), the code rolls back to the prior
version.
Signed-off-by: Brendan Dixon <brendand@microsoft.com>