- remove dead code
- call test run in a cleaner way.
- add hash2parmfile which transcodes the parmfile from a hash in
  vars.json to a valid linux/z parmfile
- enable the host to continue to run, even when the test fails, as
  development aid.
- reindent
- get the parmfile from vars.json
- reindent
- enable CTC or HSI_L3 switch in vars.json