Test external connectivity for containers

This test ensures containers have connectivity to external
network.

Change-Id: Ie85b1921726a72934c2fc8cc49ad93554091c9d7

tests/test-containers-functional.yml

@@ -47,3 +47,11 @@
           - "'/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games' in environment_content"
           - "'http_proxy=http://someproxy.example.com' in environment_content"
           - "'https_proxy=https://someproxy.example.com' in environment_content"
+    - name: Test connectivity to external address
+      shell: ping -c 3 8.8.8.8
+      register: ping_external_address
+      ignore_errors: true
+    - name: Verify connectivity to external address
+      assert:
+        that:
+          - ping_external_address.rc == 0