Multiple hardcoded credentials

[Jan Rusnacko]

Grepping for 'passw' returns several instances of hardcoded credentials in code. Some of them are commented-out examples, but some look potentially problematic, e.g.

https://github.com/openstack/networking-cisco/blob/master/devstack/csr1kv/setup_keystone_for_csr1kv_l3.sh#L17
https://github.com/openstack/networking-cisco/blob/master/networking_cisco/plugins/cisco/db/l3/device_handling_db.py#L85

General reference: https://cwe.mitre.org/data/definitions/798.html