dcnm_fabric v2. Ready for review.

[allenrobel]

Merge order

To avoid merge conflicts, please merge the following PRs in the order below.

1. dcnm_maintenance_mode
2. dcnm_image_policy v2
3. dcnm_image_ugrade v2
4. dcnm_fabric v2

Branch

dcnm_fabric_v2 created off of branch dcnm_image_upgrade_v2

Summary

• Includes idempotence fixes for:
  • SITE_ID
  • ANYCAST_RP_IP_RANGE_INTERNAL
• Aligns dcnm_fabric with the v2 support libraries.
  • Limits dependency on AnsibleModule to main() in dcnm_fabric.py.
  • Leverages RestSend() and the abstract class Sender() in sender_dcnm.py and sender_file.py.
  • Leverages Results() for outputting user results.
  • Leverages Log() for standard Python logging, enabled via ENV variable.
  • Leverages Api() endpoint classes.
• Updates integration tests with verifications for SITE_ID handling.
• Updates all unit tests to align with the above changes.