This commit, adds the pika_metric files for the zen perfgroups to the
likwid rpm-package.

Add Dockerfile + scripts for an centos7 containter to build rpm's with.

* Since the patched config.mk some binaries are omitted during the build.
  This, commmit disables them in the spec file, otherwise rpmbuild will
  fail.

The patched config.mk file provides the following settings:
* set ACCESSMODE = perf_event
* set BUILDDAEMON = false
* set BUILDFREQ = false

* get the sources of the collectd package.

* This patch is required. For pika but unfortunately not merged
  upstream. See https://github.com/collectd/collectd/pull/3327

* using collectd-5.12.0