Fixed a small bug in the UCLA task creation script

I had erroneously assumed that all questions had paths in the form "/data/\<question_id\>". This of course meant that questions within question groups were not handled properly. These changes remove that assumption and fix the issue.

@dannyroberts or anyone
Yes you are right, thanks for pointing that out. I had the false understanding that question ids were unique across the form. Changing the script to handle this properly wouldn’t be too much trouble. See https://github.com/dimagi/commcare-hq/commit/840264eb35979b96ed91d5e85c79d673f63dddb5. However, the hidden values that correspond to each multi select option currently have ids in the form `<multiselect_question_id>-<option value>`. So, if we merged that commit, next time Jeremy runs the script on a form that he already has run it on, multi selects in groups will get all new hidden values (and sub case creation actions) in addition to their old ones because now the hidden values will have the form `[<group_id>-]*<multiselect_question_id>-<option value>`.

I’ll talk to Jeremy about it. I’m guessing it hasn’t been / won’t be an issue for him because his question ids are pretty verbose.