updated logic around usage of archive_folder

tasks/main.yml

diff --git a/tasks/main.yml b/tasks/main.yml
index a605a36..e3ca119 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -63,4 +63,4 @@
       JAVA_HOME: '{{ java_home }}'
     when: opdk_version | version_compare('4.16.01', '>')
 
-  when: archive_folder is defined and archive_folder == ''
+  when: archive_folder is defined and not archive_folder == ''