Changes to Transaction card form #5576

Also, made cvv/cvd field required
Change color of records in transaction list view acc. to state #5576

Blue - in-progress, authorized and completed
Green - posted
Red - failed, cancel
Black(Default) - draft
Add dummy payment gateway

* can be used for unittests and integration tests
Merge pull request #14 from aroraumang/feature/task-5576

Changes to Transaction card form #5576
Merge pull request #15 from sharoonthomas/dummy

Add dummy payment gateway
Refactor manual gateway and add tests