Remove converter.add_drive(). Pass guest description to converter.
tests: Remove TestImage.inspect()
tests: Add GUESTCONV_NONETWORK env var to skip tests requiring network
tests: Fix brokenness in redhat_converter_test.py

Fix a couple of errors which don't look like they could ever have worked.
tests: Remove TestImage.list_kernels()
Raise a better error if converter.convert() is passed invalid xml
Default option specified by XML ordering

Rather than having a choice='' attribute, the selection is simply the first
child element in the list.
redhat: Add missing import
redhat: Fix incorrect exception class names
grub: Add detect() function and efi conversion
redhat: Convert all RHEL-based distros
NFC: Use pythonic 'typ' contraction of 'type'
redhat: Rename GuestNetworking to Network and move it into util
redhat: Replace simple uses of map with list comprehensions
tests: Fix false positive match in cmpXMLNoOrdering
redhat: NFC Replace use of re.search('^...') with re.match('...')
redhat: Make _yum_cmd accept a list of packages rather than a single package
redhat: Fix YumInstaller and Up2dateInstaller supports() method

Return value on failure was undefined
redhat: Store installer from inspect() for later use
tests: Run post-install config tasks for oz-installed images