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CI: Enhance PR validation and update branch name
ci: remove obsolete Travis support files
testbench: keep kafka/zookeeper running between tests
testbench: improve tests
enable better testing via "make distcheck"
python: clean up style and add optional checks
shellcheck: fix masked test assignments
mmjsontransform: add experimental JSON dotted-key (un)flatten
tests: harden simple shell helper failures
CI: add valgrind suppressions for -coverage gcc option
testbench: add missing shebangs
shell: clean up ShellCheck findings
testbench: do not hang on mmkubernetes tests
testbench: suppress Ubuntu 20 Kafka leak
CI: improve use of github action matrix feature; optimization