add the additional check to the condition, since what is happening is the container is attempting to run but the st2-pack-configs-from-helm-vol is not being created because the condition is not met

I've been digging in to try and understand what the init containers are doing, but the root of the problem is the init container is expecting a volume that doesn't exist as part of the pod as part of a condition, so I simply added the condition to the init container causing the issue.

If there's a better way to resolve it please let me know and I'll take a look.

Fixes #320