Resolve "Remove default passwords in values.yaml"

Thank you for making a Merge Request. Before you merge this, please make sure that you:

• Updated chart version number in Chart.yaml
• Updated the CHANGELOG.md
• (optional) Created an MR in stackspin/stackspin that applies the changes from this MR
• (optional) Tests in that MR in stackspin/stackspin succeed

Closes #993 (closed)