Python 3 ignores the __cmp__() method and doesn't have cmp() builtin
function. This caused sorted() call to raise
TypeError: unorderable types: Record() < Record()
Removing __cmp__ method and implementing __lt__ should solve the
problem as __lt__ is the only method needed for sort[ed] to work.
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
