Fix broken test on CentOS 7.

Author: geerlingguy

.travis.yml

@@ -58,6 +58,9 @@ script:
   # Ansible syntax check.
   - 'docker exec --tty "$(cat ${container_id})" env TERM=xterm ansible-playbook ${DRUPALVM_DIR}/provisioning/playbook.yml --syntax-check'
 
+  # Run the test setup playbook with ansible-playbook.
+  - 'docker exec --tty "$(cat ${container_id})" env TERM=xterm ansible-playbook ${DRUPALVM_DIR}/provisioning/test-setup.yml'
+
   # Run the playbook with ansible-playbook.
   - >
     if [ ! -z "${config_dir}" ]; then

tests/test-setup.yml

@@ -0,0 +1,8 @@
+---
+- hosts: all
+  become: yes
+
+  tasks:
+    - name: Install test dependencies (RedHat).
+      package: name=logrotate state=present
+      when: ansible_os_family == 'RedHat'