Make the password protection in debug output optional
Do not escape passwords in generated XML

All iLO's have a bug where they don't properly unescape the password
field in LOGIN, ADD_USER and MOD_USER tags. Work around this by
monkeypatching etree._escape_attrib to not escape things we don't want
escaped and mark password data as 'do not escape me'. If we find other
fields with the same bug, these can now easily be marked as well.