Expose votes in merge request api

Signed-off-by: NIslam Amer <islam.amer@jollamobile.com>

doc/api/merge_requests.md

@@ -20,6 +20,8 @@ Parameters:
         "project_id":3,
         "title":"test1",
         "state":"opened",
+        "upvotes":0,
+        "downvotes":0,
         "author":{
             "id":1,
             "username": "admin",
@@ -62,6 +64,8 @@ Parameters:
     "project_id":3,
     "title":"test1",
     "state":"merged",
+    "upvotes":0,
+    "downvotes":0,
     "author":{
         "id":1,
         "username": "admin",
@@ -106,6 +110,8 @@ Parameters:
     "project_id":3,
     "title":"test1",
     "state":"opened",
+    "upvotes":0,
+    "downvotes":0,
     "author":{
         "id":1,
         "username": "admin",
@@ -152,6 +158,8 @@ Parameters:
     "project_id":3,
     "title":"test1",
     "state":"opened",
+    "upvotes":0,
+    "downvotes":0,
     "author":{
         "id":1,
         "username": "admin",

lib/api/entities.rb

@@ -112,7 +112,7 @@ module API
     end
 
     class MergeRequest < Grape::Entity
-      expose :id, :target_branch, :source_branch, :title, :state
+      expose :id, :target_branch, :source_branch, :title, :state, :upvotes, :downvotes
       expose :target_project_id, as: :project_id
       expose :author, :assignee, using: Entities::UserBasic
     end