Add collectd-pmu package for Intel PMU (C7 only)

The intel_pmu plugin collects performance counters data
on Intel CPUs using Linux perf interface.

C7 only - C8 packaging still pending.

Change-Id: If5044346a90580c4051d6138a84ce10238807460

docker/collectd/Dockerfile.j2

@@ -82,6 +82,7 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
     {% else %}
       {% set collectd_packages = collectd_packages + [
         'collectd-hugepages',
+        'collectd-pmu',
         'collectd-rdt',
         'collectd-turbostat'
       ] %}

releasenotes/notes/collectd-pmu-6aeae4759b8a1563.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Adds ``collectd-pmu`` package to ``collectd`` RHEL-based image.
+    This allows to collect Intel PMU (performance counters) data via
+    ``collectd``.