Drop the oe.qa.add_message() usage in favour of oe.qa.handle_error() which has
code allowing it to be optimised with contains usage.
The patch also drops unused return values which we stopped using a while ago
and drops the now unneeded function parameters, generally leading to cleaner
code.
The code should be functionally equivalent.
(From OE-Core rev: 9b2eea9fd4eab4f5e12e955738db22091b91f698)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>