* Add "--namespace" to helm lint
Keep lint syntax as close as possible to "helm install" resp. "helm
upgrade", so that one only needs to change the command.
See #2036
* Align lintCmd struct
* Add "--set" and "--values" to helm lint
Keep lint syntax as close as possible to "helm install" resp. "helm
upgrade", so that one only needs to change the command.
Closes #2495,#2036
* Reuse strict parameter, when rendering during lint
We want to see the rendering fail, if we missed a value, so we reuse
"--strict".
See #2495,#2036
* Fix lint unit test
See #2495,#2036
* Update docs