* Use cached extension version if available
* Pass etag to get_ext_handler_pkgs
* Fix failing stale goal state test
* On a stale goalstate, restart extension handling
Also, simplify the fetch manifest logic which identifies a stale
goal state
* Address first round of PR comments.
* Get rid of stopgap loop for stale goal states
* Use previous pattern to populate ext manifest cache
* Simplify get_ext_manifest
* 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
Christopher Boumenot