namespaceOverride not applied when loading JCasC

[jayfo]

Describe the bug:

When namespaceOverride is set, all JCasC fails. Travis instead starts with a default configuration (e.g., with no security).

This is because the override is not applied when configuring the sidecar.

Which version of the chart:

3.1.4

How to reproduce it:

values.yaml

namespaceOverride: 'jenkins'

helm install my-release jenkins/jenkins --version version --values values.yaml

Anything else we need to know:

Workaround is to set controller.sidecars.configAutoReload.searchNamespace to the same value as namespaceOverride. But this does appear to be a bug, as the documentation for controller.sidecars.configAutoReload.searchNamespace clearly states:

# If specified, the sidecar will search for JCasC config-maps inside this namespace.
# Otherwise the namespace in which the sidecar is running will be used.

[jayfo]

I will attempt a small fix on this, looks very straightforward.