Add in missing user creation audit event.

[juliancheal]

Recieved from this PR ManageIQ/manageiq#17852

[juliancheal]

@agrare tests are passing locally, but I'm not sure where userNameType in the message

message => "User creation successful for User: userNameType with ID: #{username}"

is coming from :(

[miq-bot]

Checked commit https://github.com/juliancheal/manageiq-providers-amazon/commit/c5ce0babb75b6fa338dd21bc62793ae692e7a464 with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
1 file checked, 0 offenses detected
Everything looks fine. 👍

[agrare]

@juliancheal looks like it is coming from here

   83:     def update_user_attributes(user, username, amazon_user)
=> 84:       user.userid = username
   85:       user.name   = amazon_user.name
   86:     end
   87: 
   88:     private
(byebug) amazon_user
#<Aws::IAM::User name="userNameType">

[agrare]

I think we can improve the stubbed user to give it a better username, merging this for now to get the repo back to green.

[juliancheal]

@agrare ah are we getting that from the user stubbing? I see, that explains why I hadn't seen it I was testing the original PR with actual amazon log in.