Added method to get variant description and test #4712

Review Id: 4803002
Merge pull request #38 from goyal1092/feature/task-4712

Added method to get variant description and test #4712
Merge pull request #39 from goyal1092/feature/task-4715

Added images field in template and xml view #4715
Added method to get variant images #4715

* Added test for get variant images and default image

Review Id: 4813001