mysql_user: add "update_password: on_new_username" argument, "password_changed" result field

[betanummeric]

SUMMARY

fixes #344

• Add value on_new_username to update_password argument of module mysql_user.
• Add result field password_changed boolean to module mysql_user.

ISSUE TYPE

• Feature Pull Request

COMPONENT NAME

module mysql_user

ADDITIONAL INFORMATION

When update_password: on_new_username is set, reuse the password (plugin and authentication_string) when creating a new user if some user with the same name already exist. If the existing users with the same name have varying passwords, the password from the arguments is used like with update_password: always.

The result field password_changed is true, when the user got a new password. When the user was created with update_password: on_new_username and an existing password was reused, password_changed is false.

[codecov]

Codecov Report

Merging #365 (91a9823) into main (51a3884) will decrease coverage by 0.38%.
The diff coverage is 54.76%.

@@            Coverage Diff             @@
##             main     #365      +/-   ##
==========================================
- Coverage   78.10%   77.71%   -0.39%     
==========================================
  Files          27       27              
  Lines        2279     2307      +28     
  Branches      552      556       +4     
==========================================
+ Hits         1780     1793      +13     
- Misses        340      354      +14     
- Partials      159      160       +1     

Impacted Files	Coverage Δ
plugins/module_utils/user.py	84.48% <37.93%> (-2.68%)	⬇️
plugins/modules/mysql_user.py	82.69% <90.90%> (+1.24%)	⬆️
plugins/modules/mysql_role.py	85.71% <100.00%> (+0.04%)	⬆️

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[betanummeric]

Hi @Andersson007, @rsicart, can you have a look at this?

[Andersson007]

for other folks' information: the discussion is happening in the issue

[bmalynovytch]

Code looks good to me, except minor documentation changes.
I didn't look at code covering though.

[Andersson007]

Rebase is needed

[betanummeric]

rebased onto main

[Andersson007]

last thing

[Andersson007]

@betanummeric thanks for the contribution!
@bmalynovytch thanks for reviewing!

[Andersson007]

@betanummeric have you seen my comment? Would be great to hear your thoughts:)