Pass BaseConsumer to ConsumerContext::rebalance #554

Job	Run time
check-minimal-versions	2m 27s
check-minimal-versions	2m 27s
check-minimal-versions	2m 27s
check (macos-11.0)	6m 5s
check (macos-11.0)	6m 5s
check (macos-11.0)	6m 5s
test (7.5.1, 3.5)	1h 2m 36s
test (7.5.1, 3.5)	1h 2m 36s
test (7.5.1, 3.5)	1h 2m 36s
check (windows-2019, cmake-build,libz-static,curl-static, cmake-build,libz-static,curl-static)	7m 31s
check (windows-2019, cmake-build,libz-static,curl-static, cmake-build,libz-static,curl-static)	7m 31s
check (windows-2019, cmake-build,libz-static,curl-static, cmake-build,libz-static,curl-static)	7m 31s
lint	3m 20s
lint	3m 20s
lint	3m 20s
check (ubuntu-20.04, tracing)	3m 26s
check (ubuntu-20.04, tracing)	3m 26s
check (ubuntu-20.04, tracing)	3m 26s
test (5.3.1, 2.3)	6h 0m 13s
test (5.3.1, 2.3)	6h 0m 15s
test (5.3.1, 2.3)	6h 0m 13s
check (ubuntu-20.04, cmake-build,ssl-vendored,gssapi-vendored,libz-static,curl-static,zstd, cmake...	4m 8s
check (ubuntu-20.04, cmake-build,ssl-vendored,gssapi-vendored,libz-static,curl-static,zstd, cmake...	4m 8s
check (ubuntu-20.04, cmake-build,ssl-vendored,gssapi-vendored,libz-static,curl-static,zstd, cmake...	4m 8s
test (5.0.3, 2)	6h 0m 12s
test (5.0.3, 2)	1h 23m 46s
test (5.0.3, 2)	1h 23m 46s
test (4.1.3, 1.1)	6h 0m 14s
test (4.1.3, 1.1)	6h 0m 15s
test (4.1.3, 1.1)	6h 0m 12s
	2d 1h 17m 45s

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