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Issue description

In RH294, any lab executed more than once fails with the following message, despite the fact that I am not in the directory mentioned by the script:

[student@workstation ~]$ lab start data-factsStarting lab. · Checking lab systems .................................................................................................... SUCCESS
 · Ensuring required packages are installed ................................................................................ SUCCESS
 · Adding exercise content ................................................................................................. FAIL
    - Playbook failed: add-exercise-dirs.yml
    - workstation: Fail if user in exercise directory: User in "/home/student/data-facts" (or subdirectory). Change to "/home/student" and then run the "lab" command again.    - Cannot continue starting lab[student@workstation ~]$ 

Steps to reproduce:

run amy lab script twice

Workaround:

Delete the existing directory (and lose all files created so far)

Expected result: