Added Audit logging to new user creation

[juliancheal]

Fixes BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1602136

Raises an audit event when new external logins are auto-created for the first time.

Creates the following audit message:

User creation successful for User: Bob Builderson with ID: bob

[juliancheal]

@jvlcek @Fryguy I've got the tests passing for http auth https://github.com/ManageIQ/manageiq/pull/17852/files#diff-d367fc51a358614f7b1d4e0dced7d0f4, but what I don't understand in my tests is my user creation audits need to be in lowercase, whereas the other tests are mixed case.

example

expect(AuditEvent).to receive(:success).with(
  :event   => 'authorize',
  :userid  => 'bob',
  :message => "User creation successful for User: Bob Builderson with ID: bob@example.com",
)
expect(AuditEvent).to receive(:success).with(
  :event   => 'authenticate_httpd',
  :userid  => 'bOb',
  :message => "User bob successfully validated by External httpd",
)

[jvlcek]

@juliancheal The tests were updated to include mixed case to ensure the auth code correctly handles mixed case. I'm not sure why your tests need the userid in mixed case but I'd be glad to pair up and try to figure it you, if you'd like.

[juliancheal]

@jvlcek let's meet after standup.

[jvlcek]

👍 LGTM

[miq-bot]

Checked commits juliancheal/manageiq@2012beb~...53f2be3 with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
4 files checked, 0 offenses detected
Everything looks fine. 🍪

[juliancheal]

@gtanzillo @Fryguy We ok to merge?

[juliancheal]

@miq-bot add_label gaprindashvili/yes

[gtanzillo]

LGTM 👍