Improve use of file names for tests in tests/runner

[jjcnn]

The naming scheme for expected output files of deployment tests (init_*_output.json) do not follow the naming scheme as the expected output files from other types of tests.

We could probably improve things by organising the tests files better - both input and output files are currently lumped together in a single directory, and some of the directories have a lot of tests in them. Plus, deployment tests and transition tests are lumped together in the same directory as well.

Another thing: We perform deployment tests both in IPC mode and non-IPC mode. However, the behaviour of those modes are not identical, and do not produce the same output. This should be fixed.