reverse some changes

spec/lib/docker_container_pool_spec.rb

@@ -44,6 +44,8 @@ describe DockerContainerPool do
 
         it 'takes a container from the pool' do
           expect(described_class).not_to receive(:create_container).with(@execution_environment)
+          #  #<Double (anonymous)> received unexpected message :json with (no args)
+          #  expect(described_class).to receive(:json).with()
           expect(described_class.get_container(@execution_environment)).to eq(container)
         end
       end
@@ -60,6 +62,7 @@ describe DockerContainerPool do
       end
     end
 
+
     context 'when inactive' do
       before(:each) do
         expect(described_class).to receive(:config).and_return(active: false)