**Year to date computation improvements**

-   Some inputs on the YTD can go to multiple rules. Therefore,
    we add manual recomputation of the inputs for payslips.
    It uses opening balances to compute the total payslip YTD
    values.
-   A major update is the addition of Income Stream types to
    Year to Date values. This allows for grouping payslips with
    income stream type for employees that may have multiple income
    stream through a single fiscal year. STP requires reporting
    the year to date values for each income stream type separately.

**Single Touch Payroll Improvements**

-   Adds income stream types to the STP report. This
    allows for users with multiple income streams in
    a single fiscal year to be repored without finalisation.

-   Fixes Termination payments for genuine and
    non-genuine redundancy payments and how taxes are
    reported for taxible and non-taxible components.

-   Fixing Full file replacement for STP. This adds
    constrains for FFR, allows old payments to auto reconcile
    on a changed payslip after resubmission.

-   Adds support for missed reporting of payslips.
    If a user forgets to report a pay period and continues
    with the next pay period, They have 2 options:
        1.  Create a back dated submit event with the old
            year to date values.
        2.  Create an update event that amends the year to date
            values at todays date.
    In odoo we go for option 2. For a missed report, we create an Update
    event that updates all the ytd values up til today's date.

-   Fixes zeroing of YTD on Single touch payroll.

-   Adds a correction input type for Basic salary corrections
    without having to make any changes to past payslips. This helps
    cover under or over-payments

-   Improve validation for Single touch payroll. With better
    testing and file generation. This adds better error
    handling before running the xml validation step. This
    lowers the possibility of errors after file generation.

-  Improve performance for YTD computation to allow batching and
   caching of the values using computes on the payslips. Relies fully 
  on the ORM using search_fetch to optimize queries for the YTD 
  computation. 
    
**AU Payroll Payment reconciliation**

-   Allows old payments to auto reconcile on a changed
    payslip after resubmission.

**Standard Fixes**
-   Allow auto install of hr_payroll_account if accounting and Payroll
    app are installed. This also subsequently installs localised versions.

-   Payment register wizard fails to compute the amount, journal, etc
    since the `_compute_from_lines` is not triggered. This is because
    partner_id is the only field in the view to trigger that compute before
    create. And when a default value is passed for the partner, there is no
    need for the compute to trigger on a new record before save.

-   Salary attachments with the same code inputs always
    used the last input in the sequence for all attachments.
    This commit changes the behavior to allow multiple
    attachments with the same code inputs.
    
    
-   Salary rules generate multiple payslip lines for
    multi rule lines, but the result_rules in the
    local_dict are not updated. This commit fixes that
    and sums up the totals and amounts for all the lines
    in that rule.
    
    Task# 4201469