Enable IPv6 for lo for the canonical suite

This is needed to ensure it converges correctly.

Signed-off-by: Lance Albertson <lance@osuosl.org>

kitchen.yml

@@ -43,6 +43,7 @@ suites:
 
   - name: canonical
     run_list:
+      - recipe[test::net_setup]
       - recipe[postfix]
     attributes:
       postfix:

test/fixtures/cookbooks/test/recipes/net_setup.rb

@@ -0,0 +1,3 @@
+sysctl 'net.ipv6.conf.lo.disable_ipv6' do
+  value 0
+end