add values to specify resources on init-containers

[fogelman]

What issues does your PR fix?

• fixes #242

What does your PR do?

Allows users to specify resources for initContainers.

Checklist

For all Pull Requests

• [x] Commits are signed off
• [x] Commits have semantic messages
• [ ] Documentation updated
• [x] Passes ct linting

For releasing ONLY

• [ ] Chart.yaml version bumped
• [ ] CHANGELOG.md updated