Add random-netsplits tc, trace improvements #42
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WIP. Added a random_netsplits test case to the
locks_leader_SUITE. It currently fails. I've been working on improving thelocks_ttbtracing support, and it now works much better for long-running test cases (dropping the initial trace data and keeping the last 1000 events). A pretty-printed trace with an emacs mode header is generated for each failing test case.The random_netsplits test case is greatly inspired by the locks-test project by @ten0s but I decided to write my own to achieve better integration into the existing test suite.