Refactor: python: Improve standbytest.py.

• Disable pylint warnings we can't really do anything about.

• Simplify how the watchpats list is built.

• Get rid of the initial check of what resources are running. We don't do anything with this, and checking has no side effects aside from printing the list of resources out.

• Rename bad_run to rscs_on_node to better explain what it does.