Enable CRDs by default

[Dean-Coakley]

Proposed changes

CRDs were made GA in #772

CRDs should now be enabled by default in our provided manifests and helm chart.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto master
• I will ensure my PR is targeting the master branch and pulling from my branch from my own fork

[Dean-Coakley]

I could also leave manifests with - enable-custom-resources=false commented out and make the flag default to true if that make more sense.

https://github.com/nginxinc/kubernetes-ingress/blob/de8d38465db60f76436a8c391096b296670baa7b/cmd/nginx-ingress/main.go#L127-L128

[pleshakov]

@Dean-Coakley thx. Please update the main.go https://github.com/nginxinc/kubernetes-ingress/blob/master/cmd/nginx-ingress/main.go#L127 and change the default value to true for the -enable-custom-resources flag. Make sure to update CLI args docs as well. Also, this means you don't need to specify -enable-custom-resources in the manifests because it will be true by default.

[pleshakov]

👍