Setting up the bandit tool for the scanning of HIGH severity issues
in the python codes under Starlingx/metal folder.
Expecting this merge will enable zuul job for CI/CD of bandit scan.
1. tox.ini for adding bandit environment and command.
2. test-requirements.txt for adding bandit version.
3. .zuul.yaml file for adding bandit job and configuring under
check job to run code scan every time before code commit.
Run tox -e bandit command inside the fault folder to validate the
bandit scan and result.
Changes will be implemented in batches and this is Batch4 change.
Signed-off-by: Sharath Kumar K <firstname.lastname@example.org>