Revert cleanup from #321 (#323)

Author: basil

pom.xml

@@ -130,7 +130,7 @@
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-durable-task-step</artifactId>
-            <scope>test</scope>
+            <scope>runtime</scope> <!-- TODO switch to test once 1227.vdc0a_d1fd4338 or later is widely adopted -->
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>