Update httpapi login and logout to support 4.2.1+

[mtarking]

Related Issue(s)

Proposed Changes

Updates the httpapi plugin (plugins/httpapi/nd.py) to auto-detect whether the Nexus Dashboard instance uses the new authentication endpoints (/api/v1/infra/login, /api/v1/infra/logout) introduced in ND 4.2.1+ or the legacy endpoints (/login, /logout).

• Added _attempt_login() helper method that encapsulates a single login attempt and returns (token, status)
• Updated login() with auto-detection logic: tries /api/v1/infra/login first, falls back to /login on failure
• Caches the detected auth base path (self.auth_base_path) so subsequent re-authentication skips detection
• Updated logout() to use the detected path (/api/v1/infra/logout or /logout)
• Token parsing now reads jwttoken first, falling back to token

No configuration changes required — detection is transparent and existing inventories/playbooks work without modification. API key auth (ansible_httpapi_session_key) is unaffected since it skips login entirely.

Test Notes

• Verified syntax compiles cleanly
• Manual tested against ND < 4.2.1 (legacy /login) and ND >= 4.2.1 (/api/v1/infra/login)
• API key auth path unchanged and unaffected

Cisco Nexus Dashboard Version

• Developed against ND 4.2.1+
• Backward compatible with ND 3.2.2m

Related ND API Resource Category

• analyze
• infa
• manage
• onemanage
• other

Checklist

• Latest commit is rebased from develop with merge conflicts resolved
• New or updates to documentation has been made accordingly
• Assigned the proper reviewers

[gmicol]

LGTM

[gmicol]

LGTM

[samiib]

LGTM