Install libxml2-utils only on Ubuntu

Change-Id: I3a9a9019de44adc7d4c4802053af1b3c7d4d30f1
Issue-ID: CIMAN-33
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
diff --git a/packer/provision/local-docker.yaml b/packer/provision/local-docker.yaml
index 37ca313..c660e18 100644
--- a/packer/provision/local-docker.yaml
+++ b/packer/provision/local-docker.yaml
@@ -58,6 +58,7 @@
         name: libxml2-utils
         state: present
       become: true
+      when: ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu'
 
     - name: Install python-tox
       apt: