This is motivated by #162, but also involves changing the
NewFixtures(...) constructor which is the entry point to the whole
framework. We're removing the amount of config
you need to make it work, in line with #163.
If $KUBE_ASSETS_DIR is set, we use that and try to run the binaries from
within that directory.
If it is not set, we try to determine the assets directory as a relative
path to the test suite.
Testing the lifecycle of our fixtures with the real binaries. Test if we
can start the fixtures, the porcesses actually listen on the ports and
if we tear down all the parts successfully again.
Hannes Hörl
Gareth Smith