Upgrade scenario fails on develop

[emkll]

Description

Running upgrade scenario on develop returns the following error:

    TASK [app-test : Install pip dependencies for running the unit and functional tests.] ***
    fatal: [app-staging]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'securedrop_code' is undefined\n\nThe error appears to have been in '/tmp/molecule/securedrop/upgrade/sd-orig/install_files/ansible-base/roles/app-test/tasks/dev_setup_xvfb_for_functional_tests.yml': line 2, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n---\n- name: Install pip dependencies for running the unit and functional tests.\n  ^ here\n"}
    
    NO MORE HOSTS LEFT *************************************************************
    
    NO MORE HOSTS LEFT *************************************************************
    
    PLAY RECAP *********************************************************************
    app-staging                : ok=4    changed=2    unreachable=0    failed=1   
    mon-staging                : ok=2    changed=1    unreachable=0    failed=0
    
    
ERROR: 
Makefile:175: recipe for target 'upgrade-test-local' failed

Steps to Reproduce

1. git checkout develop
2. make build-debs
3. make upgrade-start
4. make upgrade-test-local

Expected Behavior

Upgrade scenario should complete without error.

Actual Behavior

Upgrade scenario returns error (see above)

Comments

It appears that reverting 102afb5 resolves the issue for me locally.