Remove incremental from AdminOptions

There is still no concensus in AK how to do incremental configuration
updates so instead of us providing a no-op interface now that might
not match the future Java API, we back out the public portions
but keep the internal implementation for later re-use.

Remove incremental from AdminOptions

There is still no concensus in AK how to do incremental configuration
updates so instead of us providing a no-op interface now that might
not match the future Java API, we back out the public portions
but keep the internal implementation for later re-use.

Fix win32 compilation errors and warnings

rdkafka_performance: simulate consumer processing time with -r <rate>

test 0081: AK v2.0.0 fixes error code DescribeConfigs on unknown topic

This also makes sure topics are created explicitly and not relying
on auto topic creation, for that same test.

Version v0.11.5

rpm: use internal lz4 implementation

.. to avoid outdated lz4 dependencies in rpm packages

rpm: Run mock in centos7 docker container

appveyor: reset working directory after tests, again

appveyor: reset working directory after tests