[MOS-000] Rebase fixes

Fixes for master -> UDM rebase

[MOS-785] Reworked updater dependencies into recovery

Fixed usage of updater in OS build flow to use recovery

[MOS-783] Fixed tests and simulator for Harmony

Fixed tests and simulator for Harmony
after implementation of new filesystem
structure.

[MOS-786] Add to docker required libraries

Added required libraries for building docs for recovery

[MOS-783] Moved battery config file to '/user/data'

Moved battery config file from root
directory of user partition to
'data' directory to comply with
new directory layout design.

[MOS-783] Fix not adding development assets

Small fix for development assets
Fix for jenkins build - changed SSH to HTTPS clone
for pure-core

[MOS-783] Fixed issues with generating imgs

Fixed:
- improper block count in Harmony,
resulting in ~300MB unallocated space;
- invalid rsync parameters, resulting
in nested 'factory' directory structure
creation;
- minor fixes.

[MOS-786] A/B Booting - fixed factory reset from menu

Now factory reset works both from ecoboot and from menu

[MOS-783] Fixed generating image for Harmony

Needed because of layout change

[MOS-783] Fixed Pure unit tests

Fixed (most of the) hardcoded
paths in Pure's unit tests.

[MOS-783] Working Pure simulator after partition changes

Fixed iosyscalls so that Pure simulator
works after directory structure changes.

[MOS-786] Added support for A/B boot codes in OS

Further implementation of A/B booting

[MOS-786] Added A/B booting support in OS

Added basic support for A/B booting

[MOS-783] First part of new dir structure implementation

    Works:
    - generating .img for Pure;
    - Pure boots after flashing new image and
    seems to be working fine;

    Not yet:
    - generating update package;
    - generating image for Harmony;
    - simulator;
    - path-related unit tests fail
    due to paths being hardcoded
    in test scenarios.

[MOS-806] Prepare scripts dependencies

* Added scripts dependencies
* Added script to generate scripts package
automatically
* Added integration with PureOS CMake
* [MOS-804] Created factory reset script

[MOS-802] Create DB migration script

Added database migration script(LUA).

[MOS-000] Rebase fixes

Rebase fixes

[CP-1427] Cleanup leftovers after old backup restore implementation

The synchronization mechanism has been freed from the constraints
of the old backup and restore implementation.

[CP-1423] Update backup and restore endpoint API test

Adjust the test script for new implementation of backup
and restore.
Disabling SettingsApi Test

[CP-1424] Refactor backup and restore endpoints

Redesign of backup and restore endpoints in the
service-desktop to delegate responsibility for
execution of the actual backup and restore process
onto the Updater.