updated bootstrap-ubuntu.yml

Moved the variable setting to the apt-get install part where it matters as requested in the review.

roles/bootstrap-os/tasks/bootstrap-ubuntu.yml

@@ -7,7 +7,7 @@
   ignore_errors: True
 
 - name: Bootstrap | Install python 2.x
-  raw: DEBIAN_FRONTEND=noninteractive apt-get update && apt-get install -y python-minimal
+  raw: apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y python-minimal
   when: need_bootstrap | failed
 
 - set_fact: