send works on strings

app/models/project.rb

@@ -710,7 +710,7 @@ class Project < ActiveRecord::Base
 
         if template.nil?
           # If no template, we should create an instance. Ex `create_gitlab_ci_service`
-          self.send :"create_#{service_name}_service"
+          send("create_#{service_name}_service")
         else
           Service.create_from_template(self.id, template)
         end