Adding tests to Jenkins

Jenkinsfile

@@ -24,7 +24,7 @@ pipeline {
             steps {
                 script {
                     r6rs_implementations.each { implementation->
-                        stage("${implementation} ${test}") {
+                        stage("${implementation}") {
                             catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
                                 sh "make test-r6rs COMPILE_R7RS=${implementation}"
                             }