Toggle the etcd debug logging and write the log to the test dir.
Make sure etcd and patroni are terminated when the tests finish
by sending SIGKILL in case SIGTERM does not work.
Make sure before.all code does the proper cleanup when the exception
is thrown.
Move etcd code into a separate class.
Reduce the number of global interdependencies.
Clearly define private members of PatroniController and EtcdController.
It would not make the QuantifiedCode entirely happy, since lettuce
passes the step argument to the step definition, that is not used
in the client code, but internally (via the @steps decorator on
the steps class), but that's the issue of the tool used.
Oleksii Kliukin