This commit adds python linters as it improves the code quality.
Travis CI is enabled to run linters on each PR to make sure it
follows the best practices and doesn't break the tool.
This commit:
- Adds support to run pod chaos scenarios including killing an etcd,
ApiServer and kube-apiserver using powerfulseal tool.
- Adds support to create a report with the details about each chaos
injection along with timestamps. The report is generated in the
run directory.
- Adds kubernetes package with a bunch of functions which can be
used later to talk to the kubernetes API to be able to know the
status of the targeted components/nodes.
