D7 upgrades: Warning: Use of undefined constant VIEWS_STORAGE_DEFAULT in filter_update_1004()

[klonos]

This is a follow-up to #5340

Steps to reproduce

1. install vanilla D7 + Entity Cache module
2. export the D7 database
3. install a vanilla Backdrop instance
4. import the db from step 2 above into the Backdrop site
5. open your settings.php file, and change $settings['update_free_access'] = FALSE; to TRUE
6. run /core/update.php

Actual result

Error:

Warning: Use of undefined constant VIEWS_STORAGE_DEFAULT - assumed 'VIEWS_STORAGE_DEFAULT'
(this will throw an Error in a future version of PHP)
in filter_update_1004() (line 491 of /core/modules/filter/filter.install).

Expected result

No errors.

[klonos]

I just got this again after sorting #5496. I think I might give this a crack next, to make the D7 upgrades smoother and with as less errors thrown as possible.

This time, it didn't need the Entity Cache module to be installed - I got this during a vanilla D7 -> Backdrop upgrade.

[klonos]

Simple PR that seems to fix this: backdrop/backdrop#4326