Use command line approach

- docker.Image.run uses -d, which doesn't wait for completion.  As a shell command it's fewer lines and works

Author: Chris Park

Jenkinsfile

@@ -6,12 +6,10 @@ node {
         }
         stage("Checkout Code") {
             checkout scm
-            echo "${SOURCEDIR}"
         }
         stage("Test with Docker") {
             withEnv(["API_KEY=${env.ROSETTE_API_KEY}", "ALT_URL=${env.BINDING_TEST_URL}"]) {
-                //sh "docker run --rm -e API_KEY=${API_KEY} -e ALT_URL=${ALT_URL} -v ${SOURCEDIR}:/source rosetteapi/docker-python"
-                docker.image("rosetteapi/docker-python").run("-e API_KEY=${API_KEY} -e ALT_URL=${ALT_URL} -v ${SOURCEDIR}:/source")
+                sh "docker run --rm -e API_KEY=${API_KEY} -e ALT_URL=${ALT_URL} -v ${SOURCEDIR}:/source rosetteapi/docker-python"
             }
         }
         slack(true)