List and print current files.

Jenkinsfile

@@ -1,6 +1,16 @@
 import groovy.json.JsonSlurper
+import groovy.io.FileType
+
+def files = []
+def dir = new File(".")
+dir.eachFileRecurse (FileType.FILES) { file ->
+  files << file
+}
+
+files.each {
+  println it.path
+}
 
-echo `ls -lrt */*`
 //check and parse the release file
 def inputFile = new File(".\\releases\\gcube-${params.gCube_release_number}.json")
 assert inputFile.exists() : "Release file not found (expected gcube-${params.gCube_release_number}.json)"