1c9111eaa2

Baremetal PXE driver was failing to delete the per-instance tftpboot and image directories which it created when the instance was deleted. This happened partly because of dangling files within the directory, and partly because 'unlink' does not remove directories and the error was squelched. Now, when destroy()ing an instance, PXE driver will call shutil.rmtree() on the per-instance directories which it created. Fixes bug 1101048. Change-Id: I682d0264288add488ea23e5d5200357b7be52dd9
Description
A service for managing and provisioning Bare Metal servers.
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