Backup & Restore: Remote restore fail gathering SSH public key

[Luis Eduardo Bonatti]

Brief Description
-----------------
IPV4 AIO-DX remote restore fail while running restore bootstrap.

Severity
--------
<Major: System/Feature is usable but degraded>

Steps to Reproduce
------------------
Running backup remotely
Copy the playbooks directory from target host to your
Reinstall controller
Copy the backup tarball file in the controller-0
Restore remotely using the backup file

Expected Behavior
------------------
Controller restore successful

Actual Behavior
----------------
Controller restore fail

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

System Configuration
--------------------
IPV4 AIO-DX

Branch/Pull Time/Commit
-----------------------
Master

Last Pass
---------

Timestamp/Logs
--------------

Test Activity
-------------

Workaround
----------

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/ansible-playbooks/+/845187
Committed: https://opendev.org/starlingx/ansible-playbooks/commit/959037a0a9f18252a1a5acb505cef7c85ddcfd63
Submitter: "Zuul (22348)"
Branch: master

commit 959037a0a9f18252a1a5acb505cef7c85ddcfd63
Author: lbonatti <email address hidden>
Date: Thu Jun 9 00:04:27 2022 -0400

    Fix remote restore fail gathering SSH public key

    The error is because the output of the command
    return a dict that do not contain the stdout key.
    The output contains the error saying "no password
    was provided". So the fix deactivate privilege
    escalation and with that prevents the attribute error.

    Test plan:

    AIO-DX:
    PASS: Run a full remote restore sucessfully
    PASS: Run the remote restore playbooks sucessfully
    PASS: Unlock controller-0 sucessfully
    PASS: Unlock controller-1 sucessfully

    AIO-SX:
    PASS: Run a full remote restore sucessfully
    PASS: Run the remote restore playbooks sucessfully
    PASS: Run the remote restore playbooks as root sucessfully
    PASS: Unlock controller-0 sucessfully

    Closes-bug: 1978879

    Signed-off-by: lbonatti <email address hidden>
    Change-Id: I09c1c99c749ee0422267ce677dea25ab7289e7b1