Add collectd-disk plugin

Change-Id: I1df0474844ccc804c46219fbcd0784c75b9eec7a

docker/collectd/Dockerfile.j2

@@ -10,6 +10,13 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 {% set collectd_packages = [
     'collectd'
 ] %}
+
+{% if base_distro in ['centos', 'oraclelinux', 'rhel'] %}
+  {% set collectd_packages = collectd_packages + [
+      'collectd-disk'
+  ] %}
+
+{% endif %}
 {{ macros.install_packages(collectd_packages | customizable("packages")) }}
 
 COPY extend_start.sh /usr/local/bin/kolla_extend_start