Added filter association to products
Added unit tests to check for the association
Minor tweak to repository object to just return product_id
Made a couple changes related to the comments in PR 1725
Fixed some typos in my previous
Added code address remove/validation logic as recommended in pr 1725
Renamed the repos method to applicable_repos based on suggestions in PR 1725
Commented out a couple of tests who would be acted upon later
Merge pull request #1725 from parthaa/filter-products

Filter products