title: How to read config properties in sub-workflow (separate xml file)?
body: <p>I am getting below mentioned error message while reading config properties in separate sub-workflow file. I am posting the sample code. Appreciate your help in resolving this issue. Thank you!</p>
  
  <p>2019-01-17 08:44:52,885  WARN ActionStartXCommand:523 - SERVER[localhost] USER[user1] GROUP[-] TOKEN[] APP[subWorkflow] JOB[0338958-190114130857167-oozie-oozi-W] ACTION[0338958-190114130857167-oozie-oozi-W@subWorkflowAction1] ELException in ActionStartXCommand 
  <b>javax.servlet.jsp.el.ELException: variable [jobtracker] cannot be resolved</b></p>
  
  <p><b>Coordinator job trigger command</b></p>
  
  <pre><code>oozie job --oozie http://localhost:11000/oozie --config /home/user/oozie-scripts/props/job.properties -run
  </code></pre>
  
  <p><b>job.properties</b></p>
  
  <pre><code>namenode=hdfs://localhost
  workflowpath=${namenode}/user/user1/oozie-workflow/parentWorkflow.xml
  frequency=25
  starttime=2018-08-06T13\:29Z
  endtime=2108-08-06T13\:29Z
  timezone=UTC
  oozie.coord.application.path=${namenode}/user/user1/oozie-workflow/coordinator.xml
  jobtracker=http://localhost:8088
  scriptpath=/user/user1/oozie-workflow
  </code></pre>
  
  <p><b>Coordinator</b></p>
  
  <pre><code>&lt;coordinator-app name="sampleCoord" frequency="${frequency}" start="${starttime}" end="${endtime}" timezone="${timezone}" xmlns="uri:oozie:coordinator:0.4"&gt;
  &lt;action&gt;
  &lt;workflow&gt;
  &lt;app-path&gt;${workflowpath}&lt;/app-path&gt;
  &lt;/workflow&gt;
  &lt;/action&gt;
  &lt;/coordinator-app&gt;
  </code></pre>
  
  <p><b>Parent Workflow</b></p>
  
  <pre><code>&lt;workflow-app xmlns = "uri:oozie:workflow:0.4" name = "Parent-Workflow"&gt;
  &lt;start to = "workflowAction1" /&gt;
  &lt;action name = "workflowAction1"&gt;
  &lt;sub-workflow&gt;
  &lt;app-path&gt;/user/user1/oozie-workflow/subWorkflow1.xml&lt;/app-path&gt;
  &lt;/sub-workflow&gt;
  &lt;ok to = "end" /&gt;
  &lt;error to = "end" /&gt;
  &lt;/action&gt;
  </code></pre>
  
  <p><b>Sub-Workflow</b></p>
  
  <pre><code>&lt;workflow-app xmlns = "uri:oozie:workflow:0.4" name = "subWorkflow"&gt;
  &lt;start to = "subWorkflowAction1" /&gt;
  &lt;action name = "subWorkflowAction1"&gt;
  &lt;hive xmlns = "uri:oozie:hive-action:0.4"&gt;
  &lt;job-tracker&gt;${jobtracker}&lt;/job-tracker&gt;
  &lt;script&gt;${scriptpath}/dropTempTable.hive&lt;/script&gt;
  &lt;param&gt;Temp_TableVar=${concat(concat("HBASE_",replaceAll(wf:id(),"-    ","_")),"_TEMP")}&lt;/param&gt;
  &lt;/hive&gt;
  
  &lt;ok to = "end" /&gt;
  &lt;error to = "kill_job" /&gt;
  &lt;/action&gt;
  
  
  &lt;kill name = "kill_job"&gt;
  &lt;message&gt;Job failed&lt;/message&gt;
  &lt;/kill&gt;
  &lt;end name = "end" /&gt;
  &lt;/workflow-app&gt;
  </code></pre>