Fix merge_request js -> ci_path

app/assets/javascripts/merge_requests.js.coffee

@@ -35,7 +35,7 @@ class MergeRequest
       , 'json'
 
     if @opts.ci_enable
-      $.get self.opts.url_to_ci_check, (data) =>
+      $.get @opts.url_to_ci_check, (data) =>
         this.showCiState data.status
       , 'json'
 
@@ -94,4 +94,4 @@ class MergeRequest
     this.$('.merge-in-progress').hide()
     this.$('.automerge_widget.already_cannot_be_merged').show()
 
-this.MergeRequest = MergeRequest
\ No newline at end of file
+this.MergeRequest = MergeRequest