Save Question variable name to published form XML

[stellanl]

This will help with analysis format exports after #2285, as the variable name can currently only be found in volatile form in the datastore.

@valllllll2000 , would adding variableName as an attribute of the <question> tag break anything in the app?

[valllllll2000]

@stellanl it seems at first glance that no, it will not break anything, but I want to test to make sure. Here is an example of form I will try:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<survey name="Testing Variable Name" defaultLanguageCode="en" version='1.0' app="akvoflow-uat1" surveyGroupId="147842013" surveyGroupName="New survey">
<questionGroup>
<heading>survey 2 group</heading>
<question order="1" type="free" mandatory="true" localeNameFlag="false" id="144962013" variableName="SOME_NAME"><text>survey 2 question 1</text>
</question>
</questionGroup>
</survey>

does that sound right?

[stellanl]

Perfect.

[stellanl]

Variable names must match /^[A-Za-z0-9_-]*$/ so should be ok as-is in an attribute.

[valllllll2000]

ok so I tried adding that file as bootstrap, all worked as expected

[stellanl]

Test plan:

1. Publish a form that has a variable name set for one of the questions.
2. Fetch the generated XML file from S3 (URL is in Messages list) and see that it was included.