Allow to debug ks-installer locally

Created by: RolandMa1986

Signed-off-by: Roland.Ma rolandma@yunify.com

/kind feature

Currently, we can only run the ks-installer inside in container. Troubleshooting is difficult during development. So it better to be able to run ks-installer from the working directory.

Added "--debug" flag to installRunner.py. Which will load the playbook from the working directory.