[Integration] Fix for Travis

Gemfile.lock

@@ -7,7 +7,7 @@ GIT
 
 GIT
   remote: https://github.com/CocoaPods/Core.git
-  revision: 9e592ef498539c732c2dd30bf32a40850117a4da
+  revision: d7d34813894b7b08c8e19f137a3b04cd6fcc92b0
   branch: master
   specs:
     cocoapods-core (0.24.0)

Rakefile

@@ -190,7 +190,7 @@ namespace :spec do
 
     binary_path = "#{Dir.pwd}/bin/pod"
     Dir.chdir('spec/cocoapods-integration-specs') do
-      sh "CP_TEST_POD_BINARY=#{binary_path} rake run"
+      sh "CP_TEST_POD_BINARY='#{binary_path}' bundle exec rake run"
     end
   end
 
@@ -266,7 +266,7 @@ namespace :spec do
   task :rebuild_integration_fixtures do
     binary_path = "#{Dir.pwd}/bin/pod"
     Dir.chdir('spec/cocoapods-integration-specs') do
-      sh "CP_TEST_POD_BINARY=#{binary_path} rake rebuild_after_folders"
+      sh "CP_TEST_POD_BINARY='#{binary_path}' bundle exec rake rebuild_after_folders"
     end
   end