- Integrate insanity.sh with test-framework

- Integrate insanity.sh with test-framework
- Centralize the config data to files in tests/cfg/
- Different config file can be used by setting CONFIG=file or
  using command line option:   --config <file>
- FAILURE_MODE option for insanity.sh:
  FAILURE_MODE=SOFT - shutdown services with lconf --force
  FAILURE_MODE=HARD - power down the service nodes using $POWER_DOWN
     and $POWER_UP to reboot.
  This feature should be integrated with the other tests.

- replay-single.sh, replay-dual.sh, and conf-sanity.sh all pass on hardware
- replay-ost-dual.sh and insanity.sh don't pass yet