patch_builder.py not reading "reboot required" and "unremovable" values

[Dostoievski Albino Batista]

Brief Description
-----------------
When patch's recipe contains values set to N in "reboot required" or/and "unremovable" fields, patch_builder.py doesn't not generate the metadata with the correct values.

Severity
--------
Minor

Steps to Reproduce
------------------
Use recipe with fields "reboot required" or/and "unremovable" set to N. e.g.:
[...]
    <reboot_required>N</reboot_required>
    <unremovable>N</unremovable>
[...]

Create patch and check metadata with: tar xf ${PATCH_PATH} | tar x -O
[...]
  <unremovable>Y</unremovable>
  <reboot_required>Y</reboot_required>
[...]

Expected Behavior
------------------
Patch metadata should have same values as set on recipe.

Actual Behavior
----------------
Patch metadata don't have same value as set on recipe.

Reproducibility
---------------
Reproducible

System Configuration
--------------------
N/A

Branch/Pull Time/Commit
-----------------------
master

Last Pass
---------
N/A

Timestamp/Logs
--------------
N/A

Test Activity
-------------
N/A

Workaround
----------
N/A

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/root/+/907899
Committed: https://opendev.org/starlingx/root/commit/0136ecee29593a74f4a0695b0e69c3e77ef57340
Submitter: "Zuul (22348)"
Branch: master

commit 0136ecee29593a74f4a0695b0e69c3e77ef57340
Author: Dostoievski Batista <email address hidden>
Date: Mon Feb 5 15:06:53 2024 -0300

    Fix "reboot_required" and "unremovable" values inside metadata

    This commits change metadata.py to correctly
    read the values set on recipe's fields "reboot_required"
    and "unremovable" when creating a patch.

    Test Plan:
        PASS: Generate patch with "reboot_required" and
        "unremovable" set as "N".
        PASS: Generate patch with "reboot_required" and
        "unremovable" set as "Y".

    Closes-bug: 2052458

    Change-Id: I9ba5058b296a63d98685882cee66ef6aa21c4f02
    Signed-off-by: Dostoievski Batista <email address hidden>