Integrity check fails when updating from 9.0.{0,1} to 9.0.3

[PVince81]

Update from 9.0.0 or 9.0.1 to 9.0.3 using a local update server that delivers 9.0.3.

The 9.0.3 version will have integrity check failures that don't disappear on rescan:

- core
    - INVALID_HASH
        - 3rdparty/sabre/dav/composer.json
        - 3rdparty/sabre/dav/lib/CalDAV/Plugin.php
        - 3rdparty/sabre/dav/lib/DAV/Version.php
        - 3rdparty/sabre/dav/lib/DAV/CorePlugin.php
        - 3rdparty/sabre/dav/lib/CardDAV/Backend/PDO.php
        - 3rdparty/sabre/dav/CHANGELOG.md
        - 3rdparty/composer/LICENSE
        - 3rdparty/composer/installed.json
        - 3rdparty/composer/autoload_classmap.php
        - 3rdparty/composer.lock
        - 3rdparty/composer.json

However updating from 9.0.2 to 9.0.3 works fine.

Unfortunately we can't make the updater force to go to 9.0.2 first due to encryption issues #350

@VicDeo @DeepDiver1975

[PVince81]

As discussed on IRC, @VicDeo said this is a regression.

[PVince81]

Raised owncloud/QA#268 to have this covered by automated tests

[PVince81]

We merged the revert => close