[bitnami/spring-cloud-dataflow] Fixing disabling networkPolicy creation

[andrzejdackiewicz]

Description of the change

This PR fixes disabling the creation of networkPolicy when we set networkPolicy.enabled to false.
In my case I want to deploy Spring Cloud Skipper and not create a networkPolicy.

I noticed that when I have (by default) skipper.enabled set to true then by default a networkPolicy is created.
When You add networkPolicy.enabled false, then the networkPolicy is still being created because of the bug in networkpolicy template.

I was using SpringCloudDataFlow HelmChart in 2 versions:

• 23.1.4
• 26.5.3
  In both cases the results were the same.

Benefits

It should be possible to disable creation of networkPolicy.

Possible drawbacks

Applicable issues

Additional information

Checklist

• Chart version bumped in Chart.yaml according to semver. This is not necessary when the changes only affect README.md files.
• Variables are documented in the values.yaml and added to the README.md using readme-generator-for-helm
• Title of the pull request follows this pattern [bitnami/<name_of_the_chart>] Descriptive title
• All commits signed off and in agreement of Developer Certificate of Origin (DCO)