Fix mr process order on push.

First close merge requests that being merged. Then update code of open
mr. This fixes bug when MR merged via command line lose their diff
because code reload was before MR close.
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/models/project.rb

@@ -390,18 +390,17 @@ class Project < ActiveRecord::Base
     branch_name = ref.gsub("refs/heads/", "")
     c_ids = self.repository.commits_between(oldrev, newrev).map(&:id)
 
+    # Close merge requests
+    mrs = self.merge_requests.opened.where(target_branch: branch_name).to_a
+    mrs = mrs.select(&:last_commit).select { |mr| c_ids.include?(mr.last_commit.id) }
+    mrs.each { |merge_request| MergeRequests::MergeService.new.execute(merge_request, user, nil) }
+
     # Update code for merge requests into project between project branches
     mrs = self.merge_requests.opened.by_branch(branch_name).to_a
     # Update code for merge requests between project and project fork
     mrs += self.fork_merge_requests.opened.by_branch(branch_name).to_a
-
     mrs.each { |merge_request| merge_request.reload_code; merge_request.mark_as_unchecked }
 
-    # Close merge requests
-    mrs = self.merge_requests.opened.where(target_branch: branch_name).to_a
-    mrs = mrs.select(&:last_commit).select { |mr| c_ids.include?(mr.last_commit.id) }
-    mrs.each { |merge_request| MergeRequests::MergeService.new.execute(merge_request, user, nil) }
-
     true
   end