* Use buffered producer on compacted topic processor test
* Add include directives for callback invoker where missing
* Consume until EOF on compacted topic processor test
* Port buffer test to use Catch2
* Move compacted topic processor test to Catch2
* Move configuration tests to Catch2
* Rename configuration test cases
* Move topic partition list test to Catch2
* Move handle base tests to Catch2
* Move producer tests to Catch2
* Move consumer tests to catch2
* Use CHECK on tests when appropriate
* Remove googletest
* Show tests' progress as they run
* Update message when Catch2 is not checked out
* Remove references to googletest
* Run cppkafka_tests manually on travis
* Print amount of time taken by each test case
