We've been using extraContainers value for the Ironic chart
for quite a while. This is aligned with the Helm best
practices when users cacn inject optional snippets into
templates and exporter sidecars is exactly one of such
optional things.
Change-Id: Id76c766ce38acc01af4f48784c22dccd7386034c
Signed-off-by: Vladimir Kozhukalov <kozhukalov@gmail.com>
8ba8a37de6