[job queue] add timeout when waiting for job to be launched in scdf

crss-dataflow-app/crss-dataflow-app.yml

@@ -77,6 +77,7 @@ sftp:
 
 scheduler:
   interval-milliseconds: 10000
+  launch-timeout-seconds: 900
 
 # temporary todi-config, to be moved to general config
 todi-config: