[IntegrationSpec] Add install_custom_module_map

cocoapods-integration-specs @ 053e086f

-Subproject commit e35ee4d2dd475dd8407a3f3231a403a370b5d2a0
+Subproject commit 053e086f92387ca51dff135c8477d1e1f7b2af6d

spec/integration.rb

@@ -173,6 +173,11 @@ describe_cli 'pod' do
                             'install --no-repo-update'
     end
 
+    describe 'Installs a Pod with a custom module map' do
+      behaves_like cli_spec 'install_custom_module_map',
+                            'install --no-repo-update'
+    end
+
     describe 'Installs a Pod with a custom module name' do
       behaves_like cli_spec 'install_custom_module_name',
                             'install --no-repo-update'