Add a root filesystem mount point for metricbeat to
enable access to the host file systems for collecting
filesystem specific metrics.
The filesystems are mounted under /hostfs within the
beat Pod, therefore the system.filesystem.mount_point
value must be filtered by Logstash to rewrite the path
to the original mount path on the host.
Change-Id: I7d98560eb00928e39a1c97ebc3e6b5dda8f5b278
Story: 2005733
Task: 37291
Signed-off-by: Matt Peters <matt.peters@windriver.com>
b3a982b6c1