looking up count of multivars in module config
adding context test for module multi-vars
Merge pull request #611 from Banno/fix-multivar-in-modules

looking up count of multivars in correct module config
Refactoring the way sets work internally

Before this can be merged, all providers should be updated to use the
schema.Provider approach.

Next to that a migration path for state files should be added so the
state is converted to use the new internal representation of sets.

And maybe it would be nice to add some eye candy on top of this so
displaying a set on screen (in a plan for example) doesn’t show the
internally used hashes. But that is no requirement for merging this
code.
Fixing first 90% of the tests...
Adding the test # to the output...
Pushing in latest updates, will rebase
Merge branch 'f-fix/change-set-logic' of https://github.com/svanharmelen/terraform into f-fix/change-set-logic