Currently, CSIT images as well as the nested VM use "cisco"/"cisco" as credentials.
As this is now an open-source project and no longer Cisco specific, credentials should be replaced with "csit"/"csit" or other generic credentials.
Change will impact:
- nested VM disk image (hardcoded credentials for nested VM image)
- VIRL topology file (cloud-init credentials for main image)
- Qemu CSIT Python library (login to nested VM image)
- bootstrap.sh script (login to main VM)