Updates to fix testing

- Don't use tmp, instead put in an /opt/devtools which is optionally
  removed
- Idempotency fixes
- version bumps

Change-Id: Ica3d2371809692bc09780027f0bee49025ac1bee
diff --git a/vars/Debian.yml b/vars/Debian.yml
index 7965c39..677c09e 100644
--- a/vars/Debian.yml
+++ b/vars/Debian.yml
@@ -9,3 +9,5 @@
 
 devtools_chromium_apt:
   - "chromium-shell"
+
+devtools_dist_dir: "/opt/devtools"