Remove redundancies from stacks : index.test.txt

[waynehamadi]

The index.test.txt is very redundant. We use it to know in which context the stack was collapsed.
TODO: Try to find something that gets built on Pull requests, this way stackers don't need to create it (it can be quiet tedious to create)

Success criteria: a new issue should be created that gives one solution that allows stackers to not have to use the index.test.txt