oeqa/logparser: Improve results handling

oeqa/logparser: Improve results handling

Merge the results handling into the ptest log parser as a seperate
method.

Drop the weird "pass.skip.fail." prefix to the results filename, its
just bizarre.

Drop the code turning a list into a regex then searching the regex for
an item, "x in y" is perfectly capable.

Use a dict, sort the keys as needed and drop the list sorting code.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>