Make notification_service spec DRYer by making some tests reusable

The spec for 'participatns' notifications in notification_service for both issue and merge_request is pretty simple but it was fully copied without sagnificant changes 8 times (!!!) for EVERY situation you need to notify this group of user which caused to file to extra growth and not being very DRY. And I love DRY. Since the spec is already too messy and most likely gonna to increase the size nearest time, I decided to refactor those parts.

Make notification_service spec DRYer by making some tests reusable
The spec for 'participatns' notifications in notification_service for both issue and merge_request is pretty simple but it was fully copied without sagnificant changes 8 times (!!!) for EVERY situation you need to notify this group of user which caused to file to extra growth and not being very DRY. And I love DRY. Since the spec is already too messy and most likely gonna to increase the size nearest time, I decided to refactor those parts.
e941e96f · YarNayar · 87f3a66c · e941e96f · e941e96f
Commit e941e96f authored Nov 28, 2016 by YarNayar
2 changed files
--- a/changelogs/unreleased/get-rid-of-water-from-notification_service_spec-to-make-it-DRY.yml
+++ b/changelogs/unreleased/get-rid-of-water-from-notification_service_spec-to-make-it-DRY.yml
+---
+title: Make notification_service spec DRYer by making test reusable
+merge_request: 
+author: YarNayar
--- a/spec/services/notification_service_spec.rb
+++ b/spec/services/notification_service_spec.rb