rdkafka: import pykafka.exceptions into C module
rdkafka: import pykafka.exceptions into C module

This commit imports pykafka.exceptions into the C module, so from here
on we can raise the appropriate exceptions immediately, without having
the wrapper class translate them.

Signed-off-by: Yung-Chin Oei <yungchin@yungchin.nl>
(cherry picked from commit 9dc68a44fc90c4551776c7bc92b5c33bfa29d973)
Signed-off-by: Yung-Chin Oei <yungchin@yungchin.nl>

Conflicts:
	pykafka/rdkafka/_rd_kafkamodule.c

wikimedia/operations-debs-python-pykafka,thedrow/samsa,wikimedia/operations-debs-python-pykafka,benauthor/pykafka,wikimedia/operations-debs-python-pykafka,benauthor/pykafka,thedrow/samsa,benauthor/pykafka,thedrow/samsa