Add logging of LoadError in relation to missing NewRelic module

lib/helpers.rb

@@ -384,5 +384,6 @@ helpers do
     add_method_tracer :un_flag_as_abuse
     add_method_tracer :handle_threads_query
   rescue LoadError
+    logger.warn "NewRelic agent library not installed"
   end
 end

models/comment.rb

@@ -170,5 +170,6 @@ class Comment < Content
     include ::NewRelic::Agent::MethodTracer
     add_method_tracer :to_hash
   rescue LoadError
+    logger.warn "NewRelic agent library not installed"
   end
 end

models/comment_thread.rb

@@ -162,5 +162,6 @@ class CommentThread < Content
     include ::NewRelic::Agent::MethodTracer
     add_method_tracer :to_hash
   rescue LoadError
+    logger.warn "NewRelic agent library not installed"
   end
 end

models/user.rb

@@ -151,6 +151,7 @@ class User
     add_method_tracer :subscribe
     add_method_tracer :mark_as_read
   rescue LoadError
+    logger.warn "NewRelic agent library not installed"
   end
 
 end

presenters/thread.rb

@@ -125,6 +125,7 @@ class ThreadPresenter
     add_method_tracer :to_hash
     add_method_tracer :merge_response_content
   rescue LoadError
+    logger.warn "NewRelic agent library not installed"
   end
 
 end

presenters/thread_utils.rb

@@ -46,6 +46,7 @@ module ThreadUtils
       add_method_tracer :get_read_states
       add_method_tracer :get_endorsed
     rescue LoadError
+      logger.warn "NewRelic agent library not installed"
     end
   end