* fix tuple indexerror when no accounts are found
* Fix tests for update_password not executed
* Add test for case where existing user have different password
* lint to prevent warning about jinja templating in when clause
* Refactor get_existing_authentication to return a list of all row found
Previously we were returning only the first row found. We need to be
able to see if there is a difference in the existing passwords.
* Refactor host option to be optional
This make it possible to use the same method from mysql_user to help
update_password retrieve existing password for all account with the same
username independently of their hostname. And from mysql_info to get
the password of a specif user using WHERE user = '' AND host = ''
* Add change log fragment
* Add link to the PR in the change log
* lint for ansible devel
* Fix templating type error could not cconvert to bool with ansible devel
* Revert changes made for ansible-devel that broke tests for Ansible 2.15
* Revert changes made for ansible-devel that broke tests
* Cut unnecessary set, uniqueness is ensured by the group_by in the query
* Cut auth plugin from returned values when multiple existing auths exists
Discussed here:
https://github.com/ansible-collections/community.mysql/pull/642/files#r1649720519
* fix convertion of list(dict) to list(tuple)
* Fix test for empty password on MySQL 8+
