Complete the testing circle remediation/future config

[aedwardstx]

Test full configuration workflows in a circular way that ensures correctness of hier_config's remediation and future config generating features.

• Instances
  • One set of test files for each major supported OS - IOS, EOS, NXOS, IOSXR
• Testing flow
  • Load a full running config
    • Assert that loaded running config matches the file
  • Load a full generated config
    • Assert that loaded generated config matches the file
  • Generate the remediation config
    • Assert that remediation config matches the file
  • Generate the future config running.future(remediation)
    • Assert the future config equals the generated config
  • Generate the rollback config
    • Assert that the rollback config matches the file
  • Generate the rollback_future config future.future(rollback)
    • Assert the rollback_future equals the running config
• Config files
  • Generated (aka future)
  • Running (aka rollback_future)
  • Remediation
  • Rollback