Automatically require spec_helper in .rspec file

This avoids the need to remember to manually require the spec_helper on
each spec, and the perils of forgetting to require it.

.rspec

@@ -1 +1,3 @@
--cb
+--backtrace
+--color
+--require spec_helper

spec/higher_level_api/integration/alternate_exchanges_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 describe "Any exchange" do
   let(:connection) { MarchHare.connect }
 

spec/higher_level_api/integration/basic_ack_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 describe MarchHare::Channel, "#ack" do
   let(:connection) { MarchHare.connect }
 

spec/higher_level_api/integration/basic_cancel_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 describe 'A consumer' do
   let(:connection) { MarchHare.connect }
 

spec/higher_level_api/integration/basic_consume_spec.rb

@@ -1,6 +1,3 @@
-require "spec_helper"
-
-
 describe "A consumer" do
   let(:connection) { MarchHare.connect }
 

spec/higher_level_api/integration/basic_reject_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 describe MarchHare::Channel, "#reject" do
   let(:connection) { MarchHare.connect }
 

spec/higher_level_api/integration/connection_recovery_spec.rb

@@ -1,4 +1,3 @@
-require "spec_helper"
 require "rabbitmq/http/client"
 
 describe "Connection recovery" do

spec/higher_level_api/integration/connection_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 java_import java.util.concurrent.CountDownLatch
 java_import java.util.concurrent.TimeUnit
 

spec/higher_level_api/integration/consumer_cancellation_notification_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 describe "Non-blocking consumer" do
   let(:connection) do
     MarchHare.connect

spec/higher_level_api/integration/exchange_bind_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 describe MarchHare::Exchange do
   let(:connection) { MarchHare.connect }
 

spec/higher_level_api/integration/exchange_declaration_failure_spec.rb

@@ -1,4 +1,3 @@
-require "spec_helper"
 require "rabbitmq/http/client"
 
 describe "Exchange declaration error handling" do

spec/higher_level_api/integration/exchange_declare_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 describe "Direct exchange" do
   let(:connection) { MarchHare.connect }
   let(:channel)    { connection.create_channel }

spec/higher_level_api/integration/exchange_unbind_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 describe MarchHare::Exchange do
   let(:connection) { MarchHare.connect }
 

spec/higher_level_api/integration/merry_go_round_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 describe "A message that is proxied by multiple intermediate consumers" do
   let(:c1) do
     MarchHare.connect

spec/higher_level_api/integration/message_metadata_access_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 describe "A consumer" do
   let(:connection) { MarchHare.connect }
   let(:channel)    { connection.create_channel }

spec/higher_level_api/integration/publisher_confirmations_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 describe "Any channel" do
 
   #

spec/higher_level_api/integration/queue_bind_spec.rb

@@ -1,6 +1,3 @@
-require "spec_helper"
-
-
 describe "A queue" do
 
   #

spec/higher_level_api/integration/queue_declare_spec.rb

@@ -1,6 +1,3 @@
-require "spec_helper"
-
-
 describe "Queue" do
   let(:connection) { MarchHare.connect }
   let(:channel)    { connection.create_channel }

spec/higher_level_api/integration/queue_delete_spec.rb

@@ -1,6 +1,3 @@
-require "spec_helper"
-
-
 describe "Queue" do
 
   #

spec/higher_level_api/integration/queue_purge_spec.rb

@@ -1,6 +1,3 @@
-require "spec_helper"
-
-
 describe "Any queue" do
 
   #

spec/higher_level_api/integration/queue_unbind_spec.rb

@@ -1,6 +1,3 @@
-require "spec_helper"
-
-
 describe "Any queue" do
 
   #

spec/higher_level_api/integration/sender_selected_distribution_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 describe "Any AMQP 0.9.1 client using RabbitMQ" do
 
   #

spec/higher_level_api/integration/tls_spec.rb

@@ -1,5 +1,3 @@
-require "spec_helper"
-
 describe "MarchHare.connect with TLS" do
 
   #