Install redhat-lsb-core prior to test.

tasks/main.yml

@@ -1,12 +1,9 @@
 ---
+# Variable configuration.
 - name: Include OS-specific variables.
   include_vars: "{{ ansible_os_family }}.yml"
   when: ansible_os_family != "RedHat"
 
-- name: Ensure required dependency is installed (RedHat).
-  yum: name=redhat-lsb-core state=installed
-  when: ansible_os_family == "RedHat"
-
 - name: Include OS-specific variables (RedHat).
   include_vars: "{{ ansible_os_family }}-{{ ansible_lsb.major_release }}.yml"
   when: ansible_os_family == "RedHat"

tests/Dockerfile.centos-6

@@ -1,5 +1,7 @@
 FROM centos:6
 
+RUN yum -y install redhat-lsb-core
+
 # Install Ansible
 RUN yum -y update; yum clean all;
 RUN yum -y install epel-release

tests/Dockerfile.centos-7

@@ -12,6 +12,8 @@ rm -f /lib/systemd/system/sockets.target.wants/*initctl*; \
 rm -f /lib/systemd/system/basic.target.wants/*; \
 rm -f /lib/systemd/system/anaconda.target.wants/*;
 
+RUN yum -y install redhat-lsb-core
+
 # Install Ansible
 RUN yum -y install epel-release
 RUN yum -y install git ansible sudo