[FW][FIX] hr_expense: correct bank account in payment register wizard

[fw-bot]

To reproduce:

• Add a bank account to Employee, and a bank account to your company.
• Set the company on the employee's contact to yours.
• Create an expense to be reimbursed to the employee, submit it and try to "Register Payment".

Current behaviour: the recipient bank account in the wizard is set to the company's.
Expected behaviour: the bank account in the wizard should be set to the employee's bank account.

This commit solves this.

task-3837305

Forward-Port-Of: #160749

[robodoo]

.

[fw-bot]

@alialfie @william-andre cherrypicking of pull request #160749 failed.

stdout:

Auto-merging addons/hr_expense/models/hr_expense_sheet.py
Auto-merging addons/hr_expense/tests/test_expenses.py
CONFLICT (content): Merge conflict in addons/hr_expense/tests/test_expenses.py

stderr:

20:30:59.086958 git.c:463               trace: built-in: git cherry-pick 26f73ac9bdc5dd90c9d5ab09f7c70aa9cd014136
error: could not apply 26f73ac9bdc5... [FIX] hr_expense: correct bank account in payment register wizard
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".
----------
status:

Either perform the forward-port manually (and push to this branch, proceeding as usual) or close this PR (maybe?).

In the former case, you may want to edit this PR message as well.

⚠️ after resolving this conflict, you will need to merge it via @robodoo.

More info at https://github.com/odoo/odoo/wiki/Mergebot#forward-port

[william-andre]

@robodoo r/

[william-andre]

@robodoo r+