Update test1-cloud.jenkinsfile

jenkinsfile/test1-cloud.jenkinsfile

@@ -16,7 +16,7 @@ pipeline {
         stage("Clean Workspace"){
             steps{
                 sh label: '', script: '''ls $WORKSPACE
-                rm -rf $WORKSPACE/*
+                rm -rf $WORKSPACE/.*
                 sleep 30s
                 ls $WORKSPACE'''
             }