What is the proper way to stop and remove a docker container in Jenkins when using Docker Pipeline Plugin?

I have a Jenkins pipeline that builds and runs a Docker machine, not as an agent, but using a scripting block along with the Docker Pipeline Plugin methods docker.build() and Image.run(). This works fine but if the build fails, the docker container is left running! I currently have Container.stop() in a post{ always{} } block but it doesn't seem to work. I don't want ssh into my Jenkins server to delete the container after every build and I can't just leave it because it has a specific and necessary name. How do I stop and rm the container regardless of failure of the build?

My pipeline:

pipeline {
    agent none
    stages {
        stage('Checkout') {
            agent any
            steps {
                checkout([$class: 'GitSCM', branches: [[name: '*/master']], doGenerateSubmoduleConfigurations: false, extensions: [], submoduleCfg: [], userRemoteConfigs: [[credentialsId: '<some credentials>', url: '<a git repo>']]])
            }
        }
        stage('Spin Up Receiver') {
            agent any
            steps {
                script { 
                    def receiver = docker.build("receiver",  "--rm centos7_receiver")
                    def receiver_container = receiver.run("-d -v ${PWD}/realtime_files/station_name/201707/f/20170710_191:/DSK1/SSN/LOG0_f/17001 --network='rsync_test' --name='test_receiver'")
                }
            }
        }
        stage('Run Tests') {
            agent { dockerfile { args '-v /etc/passwd:/etc/passwd --network="rsync_test"' } }
            steps {
                sh "python ./rsyncUnitTests.py"
            }
        }
    }
    post {
        always {
            script { 
                receiver_container.stop()
            }
        }
        failure {
            sendEmail('foo@bar.com')
        }
        changed {
            sendEmail('foo@bar.com')
        }
    }
}