[QA] Fix the 'Commit data' QA test

We now visit the project/wiki page after a push since that's the logical
page where we should be after a push.

Also, we now properly set the `@project` variable because the
`web_url` of a Push resource isn't necessarily it's project/wiki page
(if the project/wiki are created via the API for instance, `current_url`
would be the current page, not the project/wiki page).
Signed-off-by: Rémy Coutable <remy@rymai.me>

qa/qa/resource/repository/project_push.rb

@@ -26,6 +26,11 @@ module QA
         def repository_ssh_uri
           @repository_ssh_uri ||= project.repository_ssh_location.uri
         end
+
+        def fabricate!
+          super
+          project.visit!
+        end
       end
     end
   end

qa/qa/resource/repository/wiki_push.rb

@@ -30,6 +30,11 @@ module QA
             end
           end
         end
+
+        def fabricate!
+          super
+          wiki.visit!
+        end
       end
     end
   end

qa/qa/specs/features/browser_ui/3_create/repository/user_views_raw_diff_patch_requests_spec.rb

@@ -7,17 +7,17 @@ module QA
         Runtime::Browser.visit(:gitlab, Page::Main::Login)
         Page::Main::Login.perform(&:sign_in_using_credentials)
 
-        @project = Resource::Repository::ProjectPush.fabricate! do |push|
+        project_push = Resource::Repository::ProjectPush.fabricate! do |push|
           push.file_name = 'README.md'
           push.file_content = '# This is a test project'
           push.commit_message = 'Add README.md'
         end
+        @project = project_push.project
 
         # first file added has no parent commit, thus no diff data
         # add second file to repo to enable diff from initial commit
         @commit_message = 'Add second file'
 
-        @project.visit!
         Page::Project::Show.perform(&:create_new_file!)
         Page::File::Form.perform do |f|
           f.add_name('second')