horizon lockout service parameters need to be cleaned up

[Tyler Smith]

Brief Description
-----------------
There are service parameters for horizon lockout settings. These are no longer used since we moved to vanilla horizon and abandoned our custom lockout feature, and should be removed:

| uuid | service | section | name | value | personality | resource |
+--------------------------------------+----------+-------------+-----------------------------+-------+-------------+----------+
| 2fffed95-6883-4291-b867-3afa54fa9418 | horizon | auth | lockout_retries | 3 | None | None |
| f520a7ff-aac1-4282-bfc9-f329a7f1218b | horizon | auth | lockout_seconds | 300 | None | None |

Code locations are in horizon puppet, helm overrides, armada manifest, and sysinv.

Severity
--------
Minor

Reproducibility
---------------
Reproducible

System Configuration
--------------------
all

Branch/Pull Time/Commit
-----------------------
latest

Test Activity
-------------
Documenting

[Ghada Khalil (gkhalil)]

Low priority / not gating - code cleanup

[John Kung (john-kung)]

This bug is duplicated and fixed via https://bugs.launchpad.net/starlingx/+bug/1950490