Typical error:
```
type=AVC msg=audit(
1575367499.582:3210): avc: denied { search } for pid=26680 comm="node_exporter" name="1" dev="proc" ino=11528 scontext=system_u:system_r:container_t:s0:c100,c1014 tcontext=system_u:system_r:init_t:s0 tclass=dir permissive=0
```
node_exporter needs to be run as privileged to avoid avc denied error
since it gathers lot of information on the host.
Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1762168
Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
EnvironmentFile=-/etc/environment
ExecStartPre=-/usr/bin/{{ container_binary }} rm -f node-exporter
ExecStart=/usr/bin/{{ container_binary }} run --rm --name=node-exporter \
+ --privileged \
-v /proc:/host/proc:ro -v /sys:/host/sys:ro \
--net=host \
{{ node_exporter_container_image }} \